A minimal U(1)′ extension of MSSM in light of the B decay anomaly
Publication date: Available online 5 December 2018Source: Physics Letters BAuthor(s): Guang Hua Duan, Xiang Fan, Mariana Frank, Chengcheng Han, Jin Min YangAbstractMotivated by the RK and RK⁎ anomalies from B decays, we extend the minimal supersymmetric model with a non-universal anomaly-free U(1)′ gauge symmetry, coupling non-universally to the lepton sector as well as the quark sector. In particular, only the third generation quarks are charged under this U(1)′, which can easily evade the dilepton bound from the LHC searches. An extra singlet is introduced to break this U(1)′ symmetry allowing for the...
Source: Physics Letters B - December 6, 2018 Category: Physics Source Type: research

Editorial Board
Publication date: 10 December 2018Source: Physics Letters B, Volume 787Author(s): (Source: Physics Letters B)
Source: Physics Letters B - December 6, 2018 Category: Physics Source Type: research

Corrigendum to “On propagation of light in the vacuum between plates” [Phys. Lett. B 236 (1990) 354]
Publication date: 10 December 2018Source: Physics Letters B, Volume 787Author(s): K. Scharnhorst (Source: Physics Letters B)
Source: Physics Letters B - December 6, 2018 Category: Physics Source Type: research

Scrutinizing right-handed neutrino portal dark matter with Yukawa effect
Publication date: Available online 4 December 2018Source: Physics Letters BAuthor(s): Priyotosh Bandyopadhyay, Eung Jin Chun, Rusa Mandal, Farinaldo S. QueirozAbstractAnalyzing the neutrino Yukawa effect in the freeze-out process of a generic dark matter candidate with right-handed neutrino portal, we identify the parameter regions satisfying the observed dark matter relic density as well as the current Fermi-LAT and H.E.S.S. limits and the future CTA reach on gamma-ray signals. In this scenario the dark matter couples to the Higgs boson at one-loop level and thus could be detected by spin-independent nucleonic scattering ...
Source: Physics Letters B - December 5, 2018 Category: Physics Source Type: research

A direct dark matter search in XMASS-I
Publication date: Available online 5 December 2018Source: Physics Letters BAuthor(s): K. Abe, K. Hiraide, K. Ichimura, Y. Kishimoto, K. Kobayashi, M. Kobayashi, S. Moriyama, M. Nakahata, T. Norita, H. Ogawa, K. Sato, H. Sekiya, O. Takachio, A. Takeda, S. Tasaka, M. Yamashita, B.S. Yang, N.Y. Kim, Y.D. Kim, Y. ItowAbstractA search for dark matter using an underground single-phase liquid xenon detector was conducted at the Kamioka Observatory in Japan, particularly for Weakly Interacting Massive Particles (WIMPs). We have used 705.9 live days of data in a fiducial volume containing 97kg of liquid xenon at the center of the d...
Source: Physics Letters B - December 5, 2018 Category: Physics Source Type: research

The interior volume calculation for an axially symmetric black hole
Publication date: Available online 3 December 2018Source: Physics Letters BAuthor(s): Xin-Yang Wang, Wen-Biao LiuAbstractSince an axially symmetric metric is much more complicated than a spherically symmetric metric, the largest hypersurface that corresponds to the interior volume of a black hole proposed by Christodoulou and Rovelli, cannot be found easily. Analogous to a Schwarzschild black hole, the particular hypersurface at constant r in a Kerr black hole has been selected directly. Using the extrinsic curvature of the hypersurface, we investigate how the hypersurface deviates from the largest hypersurface as the blac...
Source: Physics Letters B - December 4, 2018 Category: Physics Source Type: research

Vacuum stability in stau-neutralino coannihilation in MSSM
Publication date: Available online 3 December 2018Source: Physics Letters BAuthor(s): Guang Hua Duan, Chengcheng Han, Bo Peng, Lei Wu, Jin Min YangAbstractThe stau-neutralino coannihilation provides a feasible way to accommodate the observed cosmological dark matter (DM) relic density in the minimal supersymmetric standard model (MSSM). In such a coannihilation mechanism the stau mass usually has an upper bound since its annihilation rate becomes small with the increase of DM mass. Inspired by this observation, we examine the upper limit of stau mass in the parameter space with a large mixing of staus. We find that the sta...
Source: Physics Letters B - December 4, 2018 Category: Physics Source Type: research

Resonant state D0⁎(2400) in the quasi-two-body B meson decays
Publication date: Available online 3 December 2018Source: Physics Letters BAuthor(s): Wen-Fei WangAbstractWe study four quasi-two-body decay processes including D0⁎(2400) as the intermediate state in the perturbative QCD (PQCD) approach. The branching fraction predicted in this work for the decay mode B−→D0⁎(2400)0π−→D+π−π− agree with the data from Belle, BaBar and LHCb Collaborations. The PQCD prediction of the branching ratio for the decay B¯0→D0⁎+K−→D0π+K− is consistent with the value given by LHCb. For the decays B¯0→D0⁎+π&min...
Source: Physics Letters B - December 4, 2018 Category: Physics Source Type: research

Quantum Twist-Deformed D = 4 Phase Spaces with Spin Sector and Hopf Algebroid Structures
Publication date: Available online 3 December 2018Source: Physics Letters BAuthor(s): Jerzy Lukierski, Stjepan Meljanac, Mariusz WoronowiczAbstractWe consider the generalized (10+10)-dimensional D=4 quantum phase spaces containing translational and Lorentz spin sectors associated with the dual pair of twist-quantized Poincare Hopf algebra H and quantum Poincare Hopf group Gˆ. Two Hopf algebroid structures of generalized phase spaces with spin sector will be investigated: first one H(10,10) describing dynamics on quantum group algebra Gˆ provides by the Heisenberg double algebra HD=H⋊Gˆ, and second, denoted...
Source: Physics Letters B - December 4, 2018 Category: Physics Source Type: research

A possible signature of extra-dimensions: The enhanced open string pair production
Publication date: Available online 3 December 2018Source: Physics Letters BAuthor(s): J.X. LuAbstractIn analogy to the Schwinger pair production in QED, there exists also the so-called open string pair production for a system of two Dp branes, placed parallel at a separation, with at least one brane carrying a worldvolume electric flux, in Type II string theories. There is however no such pair production if an isolated Dp brane carrying an electric flux is considered. The produced open strings are directly related to the brane separation, therefore to the extra-dimensions if taken from the viewpoint of a brane observer. Th...
Source: Physics Letters B - December 4, 2018 Category: Physics Source Type: research

Revised B(E3) transition rate and structure of the 3− level in 96Zr
Publication date: Available online 30 November 2018Source: Physics Letters BAuthor(s): Ł.W. Iskra, R. Broda, R.V.F. Janssens, M.P. Carpenter, B. Fornal, T. Lauritsen, T. Otsuka, T. Togashi, Y. Tsunoda, W.B. Walters, S. ZhuAbstractThe B(E3) transition strength from the 1897-keV, 3− level in 96Zr has been reevaluated from six high-statistics, independent data sets. The measured value of 42(3) W.u. is significantly lower than that adopted in recent compilations. It is, however, in line with the global systematics of collective B(E3) rates found throughout the periodic table. Thus, the “exceptional” characte...
Source: Physics Letters B - December 1, 2018 Category: Physics Source Type: research

Baryon-lepton duplicity as the progenitor of long-lived dark matter
Publication date: Available online 29 November 2018Source: Physics Letters BAuthor(s): Ernest MaAbstractIn an SU(2)R extension of the standard model, it is shown how the neutral fermion N in the doublet (N,e)R may be assigned baryon number B=1, in contrast to its SU(2)L counterpart ν in the doublet (ν,e)L which has lepton number L=1. This baryon-lepton duplicity allows a scalar σ which couples to NLNL to be long-lived dark matter. (Source: Physics Letters B)
Source: Physics Letters B - November 30, 2018 Category: Physics Source Type: research

Revisiting lepton-specific 2HDM in light of muon g − 2 anomaly
Publication date: Available online 29 November 2018Source: Physics Letters BAuthor(s): Lei Wang, Jin Min Yang, Mengchao Zhang, Yang ZhangAbstractWe examine the lepton-specific 2HDM as a solution of muon g−2 anomaly under various theoretical and experimental constraints, especially the direct search limits from the LHC and the requirement of a strong first-order phase transition in the early universe. We find that the muon g−2 anomaly can be explained in the region of 32
Source: Physics Letters B - November 30, 2018 Category: Physics Source Type: research

Flavon stabilization in models with discrete flavor symmetry
Publication date: Available online 29 November 2018Source: Physics Letters BAuthor(s): So Chigusa, Shinta Kasuya, Kazunori NakayamaAbstractWe propose a simple mechanism for stabilizing flavon fields with aligned vacuum structure in models with discrete flavor symmetry. The basic idea is that flavons are stabilized by the balance between the negative soft mass and non-renormalizable terms in the potential. We explicitly discuss how our mechanism works in A4 flavor model, and show that the field content is significantly simplified. It also works as a natural solution to the cosmological domain wall problem. (Source: Physics Letters B)
Source: Physics Letters B - November 30, 2018 Category: Physics Source Type: research

Presence of horizon makes particle motion chaotic
Publication date: Available online 29 November 2018Source: Physics Letters BAuthor(s): Surojit Dalui, Bibhas Ranjan Majhi, Pankaj MishraAbstractWe analyze the motion of a massless and chargeless particle very near to the event horizon. It reveals that the radial motion has exponential growing nature which indicates that there is a possibility of inducing chaos in the particle motion of an integrable system when it comes under the influence of the horizon. This is being confirmed by investigating the Poincaré section of the trajectories with the introduction of a harmonic trap to confine the particle's motion. Two si...
Source: Physics Letters B - November 30, 2018 Category: Physics Source Type: research

Non-commutative inspired black holes in Euler–Heisenberg non-linear electrodynamics
Publication date: Available online 29 November 2018Source: Physics Letters BAuthor(s): Marco Maceda, Alfredo MacíasAbstractWe find non-commutative inspired electrically and magnetically charged black hole solutions in Euler–Heisenberg non-linear electrodynamics. We analyse the weak energy condition and show that it is satisfied in opposition to the commutative case. We also obtain the shadow associated with these metrics that may be susceptible to observation. (Source: Physics Letters B)
Source: Physics Letters B - November 30, 2018 Category: Physics Source Type: research

Configurational Entropy can disentangle conventional hadrons from exotica
Publication date: Available online 29 November 2018Source: Physics Letters BAuthor(s): P. Colangelo, F. LoparcoAbstractWe evaluate the Configurational Entropy (CE) for scalar mesons and for JP=12+ baryons in a holographic approach, varying the dimension of boundary theory operators and using the soft-wall dual model of QCD. We find that hybrid and multiquark mesons are characterized by an increasingly large CE. A similar behavior is observed for JP=12+ baryons, where the CE of pentaquarks is larger than for three-quark baryons, for same radial number. Configurational Entropy seems relevant in disentangling conventional had...
Source: Physics Letters B - November 30, 2018 Category: Physics Source Type: research

First Observation and Study of the K± → π±π0e+e− Decay
Publication date: Available online 29 November 2018Source: Physics Letters BAuthor(s): J.R. Batley, G. Kalmus, C. Lazzeroni, D.J. Munday, M.W. Slater, S.A. Wotton, R. Arcidiacono, G. Bocquet, N. Cabibbo, A. Ceccucci, D. Cundy, V. Falaleev, M. Fidecaro, L. Gatignon, A. Gonidec, W. Kubischta, A. Maier, A. Norton, M. Patel, A. PetersAbstractThe NA48/2 experiment at CERN reports the first observation of the K±→π±π0e+e− decay from an exposure of 1.7×1011 charged kaon decays recorded in 2003–2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of...
Source: Physics Letters B - November 30, 2018 Category: Physics Source Type: research

Derivation of spontaneously broken gauge symmetry from the consistency of effective field theory II: Scalar field self-interactions and the electromagnetic interaction
Publication date: Available online 28 November 2018Source: Physics Letters BAuthor(s): D. Djukanovic, J. Gegelia, Ulf-G. MeißnerAbstractWe extend our study of deriving the local gauge invariance with spontaneous symmetry breaking in the context of an effective field theory by considering self-interactions of the scalar field and inclusion of the electromagnetic interaction. By analyzing renormalizability and the scale separation conditions of three-, four- and five-point vertex functions of the scalar field, we fix the two couplings of the scalar field self-interactions of the leading order Lagrangian. Next we add th...
Source: Physics Letters B - November 29, 2018 Category: Physics Source Type: research

Constraining P and CP violation in the main decay of the neutral Sigma hyperon
Publication date: Available online 28 November 2018Source: Physics Letters BAuthor(s): Shankar Sunil Nair, Elisabetta Perotti, Stefan LeupoldAbstractOn general grounds based on quantum field theory the decay amplitude for Σ0→Λγ consists of a parity conserving magnetic and a parity violating electric dipole transition moment. Because of the subsequent self-analyzing weak decay of the Λ hyperon the interference between magnetic and electric dipole transition moment leads to an asymmetry in the angular distribution. Comparing the decay distributions for the Σ0 hyperon and its antiparticle ...
Source: Physics Letters B - November 29, 2018 Category: Physics Source Type: research

Bohm's Potential, Classical/Quantum Duality and Repulsive Gravity
Publication date: Available online 28 November 2018Source: Physics Letters BAuthor(s): Carlos Castro PerelmanAbstractWe propose the notion of a classical/quantum duality in the gravitational case (it can be extended to other interactions). By this one means exchanging Bohm's quantum potential for the classical potential VQ↔V in the stationary quantum Hamilton-Jacobi equation (QHJE) so that VQ+V=−V0 (ground state energy). Despite that the corresponding Schrödinger equations, and their solutions differ, their associated quantum Hamilton-Jacobi equation, and ground state energy remains the same. This is how th...
Source: Physics Letters B - November 29, 2018 Category: Physics Source Type: research

Structure of parton quasi-distributions and their moments
Publication date: Available online 28 November 2018Source: Physics Letters BAuthor(s): A.V. RadyushkinAbstractWe discuss the structure of the parton quasi-distributions (quasi-PDFs) Q(y,P3) outside the “canonical” −1≤y≤1 support region of the usual parton distribution functions (PDFs). Writing the yn moments of Q(y,P3) in terms of the combined xn−2lk⊥2l-moments of the transverse momentum distribution (TMD) F(x,k⊥2), we establish a connection between the large-|y| behavior of Q(y,P3) and large-k⊥2 behavior of F(x,k⊥2). In particular, we show that the 1/k⊥2 hard tail of ...
Source: Physics Letters B - November 29, 2018 Category: Physics Source Type: research

Sea quark Sivers distribution
Publication date: Available online 28 November 2018Source: Physics Letters BAuthor(s): Hui Dong, Du-xin Zheng, Jian ZhouAbstractWe compute sea quark Sivers distribution within color glass condensate (CGC) framework. It has been found that up to the leading logarithm accuracy, the collinear twist-3 approach and the CGC calculation yield the same result for sea quark Sivers distribution in the dilute limit. We further verify that transverse momentum dependent factorization is consistent with CGC treatment at small x for the case of transverse single spin asymmetry in open charm quark production in semi-inclusive deeply inela...
Source: Physics Letters B - November 29, 2018 Category: Physics Source Type: research

Revisiting lepton-specific 2HDM in light of muon g-2 anomaly
Publication date: Available online 29 November 2018Source: Physics Letters BAuthor(s): Lei Wang, Jin Min Yang, Mengchao Zhang, Yang ZhangAbstractWe examine the lepton-specific 2HDM as a solution of muon g−2 anomaly under various theoretical and experimental constraints, especially the direct search limits from the LHC and the requirement of a strong first-order phase transition in the early universe. We find that the muon g-2 anomaly can be explained in the region of 32
Source: Physics Letters B - November 29, 2018 Category: Physics Source Type: research

Generalized quasi parton distributions in a diquark spectator model
Publication date: Available online 29 November 2018Source: Physics Letters BAuthor(s): Shohini Bhattacharya, Christopher Cocuzza, Andreas MetzAbstractRecently the concept of quasi parton distributions (quasi-PDFs) for hadrons has been proposed. Quasi-PDFs are defined through spatial correlation functions and as such can be computed numerically using quantum chromodynamics on a four-dimensional lattice. As the hadron momentum is increased, the quasi-PDFs converge to the corresponding standard PDFs that appear in factorization theorems for many high-energy scattering processes. Here we investigate this new concept in the cas...
Source: Physics Letters B - November 29, 2018 Category: Physics Source Type: research

Search for heavy charged long-lived particles in proton–proton collisions at s=13TeV using an ionisation measurement with the ATLAS detector
Publication date: Available online 1 November 2018Source: Physics Letters BAuthor(s): M. Aaboud, G. Aad, B. Abbott, O. Abdinov, B. Abeloos, D.K. Abhayasinghe, S.H. Abidi, O.S. AbouZeid, N.L. Abraham, H. Abramowicz, H. Abreu, Y. Abulaiti, B.S. Acharya, S. Adachi, L. Adam, L. Adamczyk, J. Adelman, M. Adersberger, A. Adiguzel, T. AdyeAbstractThis Letter presents a search for heavy charged long-lived particles produced in proton–proton collisions at s=13TeV at the LHC using a data sample corresponding to an integrated luminosity of 36.1fb−1 collected by the ATLAS experiment in 2015 and 2016. These particles are exp...
Source: Physics Letters B - November 28, 2018 Category: Physics Source Type: research

Searching for the Subatomic Swirls in the CuCu and CuAu Collisions
Publication date: Available online 27 November 2018Source: Physics Letters BAuthor(s): Shuzhe Shi, Kangle Li, Jinfeng LiaoAbstractRecently the STAR Collaboration reported measurement of the “subatomic swirls”, that is, the most vortical fluid flow structures in the quark-gluon plasma produced via the AuAu collisions at the Relativistic Heavy Ion Collider (RHIC). This result has attracted significant interest and generated wide enthusiasm. For such an important finding, it is crucial to look for additional evidences of confirmation and to critically test the current interpretation of the global polarization meas...
Source: Physics Letters B - November 28, 2018 Category: Physics Source Type: research

Modified gravity as a diagravitational medium
Publication date: Available online 27 November 2018Source: Physics Letters BAuthor(s): José A.R. Cembranos, Mario Coma Díaz, Prado Martín-MorunoAbstractIn this letter we reflect on the propagation of gravitational waves in alternative theories of gravity, which are typically formulated using extra gravitational degrees of freedom in comparison to General Relativity. We propose to understand that additional structure as forming a diagravitational medium for gravitational waves characterized by a refractive index. Furthermore, we shall argue that the most general diagravitational medium has associated an...
Source: Physics Letters B - November 28, 2018 Category: Physics Source Type: research

Total hadronic cross sections at high energies in holographic QCD
We present our analysis on high energy hadron-hadron scattering in the framework of the holographic QCD. Combining the Brower-Polchinski-Strassler-Tan Pomeron exchange kernel and gravitational form factors of the involved hadrons which are obtained by using the bottom-up AdS/QCD models in the five-dimensional AdS space, we calculate the total cross sections at high energies. We show that our calculations for the nucleon-nucleon scattering agree with the experimental data including the recent ones taken by the TOTEM collaboration at the LHC. The present framework is applicable to any high energy process, in which the strong...
Source: Physics Letters B - November 27, 2018 Category: Physics Source Type: research

Horizon temperature on the real line
Publication date: Available online 27 November 2018Source: Physics Letters BAuthor(s): Michele Arzano, Jerzy Kowalski-GlikmanAbstractWe illustrate the analogue of the Unruh effect for a quantum system on the real line. Our derivation relies solely on basic elements of representation theory of the group of affine transformations without a notion of time or metric. Our result shows that a thermal distribution naturally emerges in connecting quantum states belonging to representations associated to distinct notions of translational symmetry. (Source: Physics Letters B)
Source: Physics Letters B - November 27, 2018 Category: Physics Source Type: research

A broad pseudovector glueball from holographic QCD
Publication date: Available online 27 November 2018Source: Physics Letters BAuthor(s): Frederic Brünner, Josef Leutgeb, Anton RebhanAbstractWe study the decay of a pseudovector glueball with quantum numbers JPC=1+−, the lightest glueball with spin different from zero or two, in the top-down holographic Witten-Sakai-Sugimoto model. This glueball is dual to the string-theoretic Kalb-Ramond tensor field, which completely fixes all its couplings by gauge invariance and D-brane anomaly inflow. The dominant decay channels are determined by a Chern-Simons-like action for the flavor branes; couplings from the Dirac-Born...
Source: Physics Letters B - November 27, 2018 Category: Physics Source Type: research

Direct photon elliptic flow in Pb–Pb collisions at sNN=2.76 TeV
Publication date: Available online 23 November 2018Source: Physics Letters BAuthor(s): S. Acharya, F.T. -. Acosta, D. Adamová, J. Adolfsson, M.M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, S.U. Ahn, S. Aiola, A. Akindinov, M. Al-Turany, S.N. Alam, D.S.D. Albuquerque, D. Aleksandrov, B. Alessandro, R. Alfaro Molina, Y. Ali, A. AliciAbstractThe elliptic flow of inclusive and direct photons was measured at mid-rapidity in two centrality classes 0–20% and 20–40% in Pb–Pb collisions at sNN=2.76 TeV by ALICE. Photons were detected with the highly segmented electromagnetic calorimet...
Source: Physics Letters B - November 24, 2018 Category: Physics Source Type: research

Minimal AdS-Lorentz supergravity in three-dimensions
Publication date: Available online 23 November 2018Source: Physics Letters BAuthor(s): O. Fierro, F. Izaurieta, P. Salgado, O. ValdiviaAbstractThe N=1 AdS-Lorentz superalgebra is studied and its relationship to semigroup expansion developed. Using this mathematical tool, the invariant tensors and Casimir operators are found. In terms of these invariants, a three-dimensional Chern–Simons supergravity action with AdS-Lorentz symmetry is constructed. The Killing spinors for a BTZ black-hole like solution of the theory are discussed. (Source: Physics Letters B)
Source: Physics Letters B - November 24, 2018 Category: Physics Source Type: research

Variation of α from a dark matter force
Publication date: Available online 23 November 2018Source: Physics Letters BAuthor(s): Hooman Davoudiasl, Pier Paolo GiardinoAbstractWe consider a long range scalar force that mainly couples to dark matter and unstable Standard Model states, like the muon, with tiny strength. Probing this type of force would present a challenge to observations. We point out that the dependence of the induced background scalar field on dark matter number density can cause the mass of the unstable particles to have spatial and temporal variations. These variations, in turn, leave an imprint on the value of the fine structure constant α...
Source: Physics Letters B - November 24, 2018 Category: Physics Source Type: research

On the threshold resummation in forward pA collisions
Publication date: Available online 23 November 2018Source: Physics Letters BAuthor(s): Bo-Wen Xiao, Feng YuanAbstractIn this paper, using the Higgs production in forward rapidity region in proton-nucleus collisions as an example, we demonstrate that we can construct a systematic formalism for the threshold resummation for forward rapidity particle productions in the saturation formalism. The forward threshold jet function, which satisfies the corresponding renormalization group equation, is introduced into the new factorization formula. This calculation can be easily generalized to other processes, such as single forward h...
Source: Physics Letters B - November 24, 2018 Category: Physics Source Type: research

Exploring the intrinsic Lorentz-violating parameters at DUNE
Publication date: Available online 23 November 2018Source: Physics Letters BAuthor(s): Gabriela Barenboim, Mehedi Masud, Christoph A. Ternes, Mariam TórtolaAbstractNeutrinos can push our search for new physics to a whole new level. What makes them so hard to be detected, what allows them to travel humongous distances without being stopped or deflected allows to amplify Planck suppressed effects (or effects of comparable size) to a level that we can measure or bound in DUNE. In this work we analyze the sensitivity of DUNE to CPT and Lorentz-violating interactions in a framework that allows a straightforward extrapola...
Source: Physics Letters B - November 24, 2018 Category: Physics Source Type: research

Precise QCD description of the Higgs boson transverse momentum spectrum
Publication date: Available online 23 November 2018Source: Physics Letters BAuthor(s): Xuan Chen, Thomas Gehrmann, E.W. Nigel Glover, Alexander Huss, Ye Li, Duff Neill, Markus Schulze, Iain W. Stewart, Hua Xing ZhuAbstractThe transverse momentum (pT) distribution of Higgs bosons at hadron colliders enables a detailed probe of its production dynamics and is a key ingredient to precision studies of Higgs boson properties, but receives very large QCD corrections. We obtain a precision prediction for the pT spectrum by matching second-order (NNLO) QCD corrections at large pT with resummation of third-order logarithmic (N3LL) c...
Source: Physics Letters B - November 24, 2018 Category: Physics Source Type: research

Search for vector-boson resonances decaying to a top quark and bottom quark in the lepton plus jets final state in pp collisions at s=13 TeV with the ATLAS detector
Publication date: Available online 22 November 2018Source: Physics Letters BAuthor(s): M. Aaboud, G. Aad, B. Abbott, O. Abdinov, B. Abeloos, D.K. Abhayasinghe, S.H. Abidi, O.S. AbouZeid, N.L. Abraham, H. Abramowicz, H. Abreu, Y. Abulaiti, B.S. Acharya, S. Adachi, L. Adamczyk, J. Adelman, M. Adersberger, A. Adiguzel, T. Adye, A.A. AffolderAbstractA search for new charged massive gauge bosons, W′, is performed with the ATLAS detector at the LHC. Data were collected in proton–proton collisions at a centre-of-mass energy of s = 13 TeV and correspond to an integrated luminosity of 36.1fb−1. This analysis searc...
Source: Physics Letters B - November 23, 2018 Category: Physics Source Type: research

Universal Extra Dimension models with gravity mediated decays after LHC Run II data
Publication date: Available online 22 November 2018Source: Physics Letters BAuthor(s): Kirtiman Ghosh, Durmus Karabacak, S. NandiAbstractIn the ‘fat-brane’ realization of Universal Extra Dimension (UED) models, the gravity mediated decays of Kaluza–Klein (KK) excitations of the Standard Model (SM) particles offer interesting collider signals. Colored level-1 KK-particles (quarks q1 and/or gluons g1) are pair-produced at the colliders due to conserved KK-parity. These particles, then, cascade decay into lighter level-1 KK-particle in association with one or more SM particles until producing lightest KK par...
Source: Physics Letters B - November 23, 2018 Category: Physics Source Type: research

The concept of nuclear photon strength functions: A model-independent approach via (γ→,γ′γ″) reactions
We present a novel experimental approach that allows for the first time to experimentally determine the photon strength function simultaneously in two independent ways by a unique combination of quasi-monochromatic photon beams and a newly implemented γ-γ coincidence setup. This technique does not assume a priori the validity of the Brink-Axel hypothesis and sets a benchmark in terms of the detection sensitivity for measuring decay properties of photo-excited states below the neutron separation energy. The data for the spherical off-shell nucleus 128Te were obtained for γ-ray beam-energy settings between ...
Source: Physics Letters B - November 23, 2018 Category: Physics Source Type: research

48Si: An atypical nucleus?
Publication date: Available online 22 November 2018Source: Physics Letters BAuthor(s): Jia Jie Li, Wen Hui Long, Jérôme Margueron, Nguyen Van GiaiAbstractUsing the relativistic Hartree-Fock Lagrangian PKA1, we investigate the properties of the exotic nucleus 48Si, which is predicted to be an atypical nucleus characterized by i) the onset of doubly magicity, ii) its location at the drip line, iii) the presence of dual semi-bubble structure (distinct central depletion in both of neutron and proton density profiles) in the ground state, and iv) the occurrence of pairing reentrance at finite temperature. While not...
Source: Physics Letters B - November 23, 2018 Category: Physics Source Type: research

Bardeen black hole chemistry
Publication date: Available online 22 November 2018Source: Physics Letters BAuthor(s): Athanasios G. TzikasAbstractIn the present paper we try to connect the Bardeen black hole with the concept of the recently proposed black hole chemistry. We study thermodynamic properties of the regular black hole with an anti-deSitter background. The negative cosmological constant Λ plays the role of the positive thermodynamic pressure of the system. After studying the thermodynamic variables, we derive the corresponding equation of state and we show that a neutral Bardeen-anti-deSitter black hole has similar phenomenology to the...
Source: Physics Letters B - November 23, 2018 Category: Physics Source Type: research

The twist-three distribution eq(x,k⊥) in a light-front model
Publication date: Available online 22 November 2018Source: Physics Letters BAuthor(s): Barbara Pasquini, Simone RodiniAbstractWe discuss the twist-three, unpolarized, chiral-odd, transverse momentum dependent parton distribution (TMD) eq(x,k⊥) within a light-front model. We review a model-independent decomposition of this TMD, which follows from the QCD equations of motion and is given in terms of a mass term, a pure interaction-dependent contribution, and singular terms. The mass-term and pure twist-three contributions are represented in terms of overlap of light-front wave functions (LFWFs), taking into account the ...
Source: Physics Letters B - November 23, 2018 Category: Physics Source Type: research

Electric Dipole Moments from CP-Violating Scalar Leptoquark Interactions
Publication date: Available online 22 November 2018Source: Physics Letters BAuthor(s): Kaori Fuyuto, Michael Ramsey-Musolf, Tianyang ShenAbstractWe analyze the implications of CP-violating scalar leptoquark (LQ) interactions for experimental probes of parity- and time-reversal violating properties of polar molecules. These systems are predominantly sensitive to the electric dipole moment (EDM) of the electron and nuclear-spin-independent (NSID) electron-nucleon interaction. The LQ model can generate both a tree-level NSID interaction as well as the electron EDM at one-loop order. Including both interactions, we find that t...
Source: Physics Letters B - November 22, 2018 Category: Physics Source Type: research

Probing the gauge symmetry breaking of the early universe in 3-3-1 models and beyond by gravitational waves
Publication date: Available online 19 November 2018Source: Physics Letters BAuthor(s): Fa Peng Huang, Xinmin ZhangAbstractTaking the 3-3-1 models (with SU(3)c⊗SU(3)L⊗U(1)Y gauge group) as examples, we study that a class of new physics models with extended gauge group could undergo one or several first-order phase transitions associated with the spontaneously symmetry breaking processes during the evolution of the universe, which can produce detectable phase transition gravitational wave (GW) signals at future GW experiments, such as LISA, BBO, DECIGO, SKA and aLIGO. These GW signals can provide new sources of...
Source: Physics Letters B - November 21, 2018 Category: Physics Source Type: research

Scalaron the healer: removing the strong-coupling in the Higgs- and Higgs-dilaton inflations
Publication date: Available online 19 November 2018Source: Physics Letters BAuthor(s): Dmitry Gorbunov, Anna TokarevaAbstractWe show that introducing R2-term makes the Higgs-inflation and Higgs-dilaton inflation consistent models: the strong coupling energy scales in scalar, gauge and gravity sectors all are lifted up to the Planck scale. (Source: Physics Letters B)
Source: Physics Letters B - November 21, 2018 Category: Physics Source Type: research

Decoupling gravitational sources in general relativity: The extended case
Publication date: Available online 20 November 2018Source: Physics Letters BAuthor(s): J. OvalleAbstractWe show how to decoupling two spherically symmetric and static gravitational sources through the most general possible extension of the so-called Minimal Geometric Deformation-decoupling. As a test, we decouple the Einstein-Maxwell system and reproduce the Reissner-Nordstrom solution. We show the potential of this method to study i) the consequences of modified gravity on general relativity, ii) to investigate the conjectured dark matter, and iii) to study hairy black holes. (Source: Physics Letters B)
Source: Physics Letters B - November 21, 2018 Category: Physics Source Type: research

Absorption and scattering of a black hole with a global monopole in f(R) gravity
Publication date: Available online 20 November 2018Source: Physics Letters BAuthor(s): M.A. Anacleto, F.A. Brito, S.J.S. Ferreira, E. PassosAbstractIn this paper we consider the solution of a black hole with a global monopole in f(R) gravity and apply the partial wave approach to compute the differential scattering cross section and absorption cross section. We show that in the low-frequency limit and at small angles the contribution to the dominant term in the scattering/absorption cross section is modified by the presence of the global monopole and the gravity modification. In such limit, the absorption cross section sho...
Source: Physics Letters B - November 21, 2018 Category: Physics Source Type: research

Scaling properties of cosmological axion strings
Publication date: Available online 20 November 2018Source: Physics Letters BAuthor(s): C.J.A.P. MartinsAbstractThere has been recent interest in the evolution and cosmological consequences of global axionic string networks, and in particular in the issue of whether or not these networks reach the scale-invariant scaling solution that is known to exist for the simpler Goto-Nambu and Abelian-Higgs string networks. This is relevant for determining the amount and spectrum of axions they produce. We use the canonical velocity-dependent one-scale model for cosmic defect network evolution to study the evolution of these global ne...
Source: Physics Letters B - November 21, 2018 Category: Physics Source Type: research

Biadjoint wires
Publication date: Available online 20 November 2018Source: Physics Letters BAuthor(s): Nadia Bahjat-Abbas, Ricardo Stark-Muchão, Chris D. WhiteAbstractBiadjoint scalar field theory has been the subject of much recent study, due to a number of applications in field and string theory. The catalogue of exact non-linear solutions of this theory is relatively unexplored, despite having a role to play in extending known relationships between gauge and gravity theories, such as the double copy. In this paper, we present new solutions of biadjoint scalar theory, corresponding to singular line configurations in four spacetim...
Source: Physics Letters B - November 21, 2018 Category: Physics Source Type: research