Wed·Jan 9, 2019Wednesday·January 9, 2019

1. 01*

   Flavor constraints on electroweak ALP couplings

   M.B. Gavela🇪🇸 · R. Houtz🇪🇸 · P. Quilez🇪🇸 · R. del Rey🇪🇸 · O. Sumensari🇮🇹

   We explore the signals of axion-like particles (ALPs) in flavor-changing neutral current (FCNC) processes. The most general effective linear Lagrangian for ALP couplings to the electroweak bosonic sector is considered, and its contribution to FCNC decays is computed up to one-loop order. The interplay between the different couplings opens new territory for experimental exploration, as analyzed here in the ALP mass range $0<m_a\lesssim 5$ GeV. When kinematically allowed, $K\to \pi \nu \bar{\nu }$ decays provide the most stringent constraints for channels with invisible final states, while $B$-meson decays are more constraining for visible decay channels, such as displaced vertices in $B\to K^{(\ast )}{\mu }^{+}{\mu }^{-}$ data. The complementarity with collider constraints is discussed as well.

   hep-phEPJC(2019)·127 citations
2. 02*

   The complete study on the inclusive production of {\Upsilon} + {\gamma} at the LHC

   Rong Li🇨🇳 · Jian-Xiong Wang🇨🇳

   In this paper we investigate the inclusive associated production of {\Upsilon} + {\gamma} at the hadron collider. We calculate the color-singlet sub-processes and all three color-octet sub-processes at the next-to-leading order. Seven sets of long distance matrix elements(LDMEs), which are extracted from the studies on the prompt production of {\Upsilon} at hadron colliders, are used to give the numerical results and we find that there are three sets of LDMEs give the unphysical results on the yield and the polarization for this process. The yield is enhanced by several or two orders times comparing to that of color-singlet process and the polarization changes from longitudinal to slightly transverse or even mainly transverse in the large pt region. The estimation results indicate that to study the process at the large hadron collider (LHC) is difficult and it may be well investigated at the future Super Proton-Proton Collider(SPPC).

   hep-phPRD(2019)·9 citations
3. 03*

   Strong decays of the $Y(4660)$ as a vector tetraquark state in solid quark-hadron duality

   Zhi-Gang Wang🇨🇳

   In this article, we choose the $[sc{]}_P[\bar{s}\bar{c}{]}_A-[sc{]}_A[\bar{s}\bar{c}{]}_P$ type tetraquark current to study the hadronic coupling constants in the strong decays $Y(4660)\to J/\psi f_0(980)$, ${\eta }_c\varphi (1020)$, ${\chi }_{c0}\varphi (1020)$, $D_s{\bar{D}}_s$, $D_s^{\ast }{\bar{D}}_s^{\ast }$, $D_s{\bar{D}}_s^{\ast }$, $D_s^{\ast }{\bar{D}}_s$, ${\psi }^{\prime }{\pi }^{+}{\pi }^{-}$, $J/\psi \varphi (1020)$ with the QCD sum rules based on solid quark-hadron quality. The predicted width $\Gamma (Y(4660))=74.2_{-19.2}^{+29.2}\mathrm{MeV}$ is in excellent agreement with the experimental data $68\pm 11\pm 1\text{mbox}MeV$ from the Belle collaboration, which supports assigning the $Y(4660)$ to be the $[sc{]}_P[\bar{s}\bar{c}{]}_A-[sc{]}_A[\bar{s}\bar{c}{]}_P$ type tetraquark state with $J^{PC}=1^{--}$. In calculations, we observe that the hadronic coupling constants $|G_{Y{\psi }^{\prime }{f}_0}|\gg |G_{YJ/\psi f_0}|$, which is consistent with the observation of the $Y(4660)$ in the ${\psi }^{\prime }{\pi }^{+}{\pi }^{-}$ mass spectrum, and favors the ${\psi }^{\prime }{f}_0(980)$ molecule assignment. It is important to search for the process $Y(4660)\to J/\psi \varphi (1020)$ to diagnose the nature of the $Y(4660)$, as the decay is greatly suppressed.

   hep-phEPJC(2019)·42 citations
4. 04*

   LPNHE scientific perspectives for the European Strategy for Particle Physics

   E. Ben Haim🇫🇷 · G. Bernardi🇫🇷 · E. Bertholet🇫🇷 · J. Bolmont🇫🇷 · M. Bomben🇫🇷 · N. Busca🇫🇷 · G. Calderini🇫🇷 · R. Camacho Toro🇫🇷 · M. Charles🇫🇷 · J. Chauveau🇫🇷 · R. Cornat🇫🇷 · F. Crescioli🇫🇷 and 29 other authors

   This note summarizes the activities and the scientific and technical perspectives of the Laboratoire de Physique Nucleaire et de Hautes Energies (LPNHE) at Sorbonne University, Paris. Although the ESPP is specifically aimed at particle physics, we discuss in this note in parallel the three scientific lines developed at LPNHE (Particle Physics, Astroparticles, Cosmology), first with the current scientific activities, then for the future activities. However, our conclusions and recommendations are focused on the particle physics strategy.

   hep-phhep-ex0 citations
5. 05*

   Thrust distribution in Higgs decays at the next-to-leading order and beyond

   Jun Gao🇨🇳 · Yinqiang Gong🇨🇳 · Wan-Li Ju🇨🇳 · Li Lin Yang🇨🇳

   We present predictions for the thrust distribution in hadronic decays of the Higgs boson at the next-to-leading order and the approximate next-to-next-to-leading order. The approximate NNLO corrections are derived from a factorization formula in the soft/collinear phase-space regions. We find large corrections, especially for the gluon channel. The scale variations at the lowest orders tend to underestimate the genuine higher order contributions. The results of this paper is therefore necessary to control the perturbative uncertainties of the theoretical predictions. We also discuss on possible improvements to our results, such as a soft-gluon resummation for the 2-jets limit, and an exact next-to-next-to-leading order calculation for the multi-jets region.

   hep-phJHEP(2019)·29 citations
6. 06*

   Current status and future prospects of the singlet-doublet dark matter model with $CP$ violation

   Tomohiro Abe🇯🇵 · Ryosuke Sato🇩🇪

   We discuss the singlet-doublet fermion dark matter model with CP-violation. In this model, the CP-violation generates a pseudo-scalar interaction of dark matter with the SM-Higgs boson. Thanks to the pseudo-scalar interaction, the model can evade the strong constraint from the dark matter direct detection experiments while keeping the success of the thermal relic scenario. The CP-violation also predicts signals in dark matter indirect detection experiments and electric dipole moments (EDM) that can be as large as the current upper bound. We investigate the constraints and prospects of the direct detection experiments, the indirect detection experiment, and the electron EDM. We also investigate the stability of the Higgs potential. Combining these observables, we find that heavy dark matter is disfavored. We also find it is possible to probe the Higgs funnel region by the combination of the direct detection experiments and the measurements of the electron EDM if experiments for the electron EDM reach to $O(10^{-32})$ e cm in future.

   hep-phPRD(2019)·26 citations
7. 07*

   General structure of the neutral $\rho$ meson self-energy and its spectral properties in a hot and dense magnetized medium

   Snigdha Ghosh🇮🇳 · Arghya Mukherjee🇮🇳 · Pradip Roy🇮🇳 · Sourav Sarkar🇮🇳

   The one loop self energy of the neutral $\rho$ meson is obtained for the effective $\rho \pi \pi$ and $\rho NN$ interaction at finite temperature and density in the presence of a constant background magnetic field of arbitrary strength. In our approach, the eB-dependent vacuum part of the self energy is extracted by means of dimensional regularization where the ultraviolet divergences corresponding to the pure vacuum self energy manifest as the pole singularities of gamma as well as Hurwitz zeta functions. This improved regularization procedure consistently reproduces the expected results in the vanishing magnetic field limit and can be used quite generally in other self energy calculations dealing with arbitrary magnetic field strength. In presence of the external magnetic field, the general Lorentz structure for the in-medium vector boson self energy is derived which can also be implemented in case of the gauge bosons such as photons and gluons. It has been shown that with vanishing perpendicular momentum of the external particle, essentially two form factors are sufficient to describe the self energy completely. Consequently, two distinct modes are observed in the study of the effective mass, dispersion relations and the spectral function of ${\rho }^0$ where one of the modes possesses two fold degeneracy. For large baryonic chemical potential, it is observed that the critical magnetic field required to block the ${\rho }^0\to {\pi }^{+}{\pi }^{-}$ decay channel increases significantly with temperature. However, in case of smaller values reaching down to vanishing chemical potential, the critical field follows the opposite trend.

   hep-phnucl-thPRD(2019)·28 citations
8. 08*

   Leptonic CP violation in flipped SU(5) GUT from $Z_{12-I}$ Orbifold Compactification

   Junu Jeong🇰🇷 · Jihn E. Kim🇰🇷 · Soonkeon Nam🇰🇷

   We obtain a phenomenologically acceptable PMNS matrix in a flipped SU(5) model inspired by the compactification of heterotic string $E_8\times E_8^{\prime }$. To analyze the Jarlskog determinant efficiently, we include the simple Kim-Seo form for the Pontecorbo-Maki-Nakagawa-Sakata matrix. We also noted that $|{\delta }_{\mathrm{PMNS}}|\lesssim 64^{\mathrm{o}}$ for the normal hierarchy of neutrino masses with the PDG book parametrization.

   hep-phPLB(2019)·5 citations
9. 09*

   Polarization of top quark in vector-like quark decay

   Hang Zhou🇨🇳 · Ning Liu🇨🇳

   Vector-like quarks (VLQs) are attractive extensions to the Standard Model. They mix with the SM quarks and can lead to rich phenomenology. Determination of VLQ's interaction structure with the SM is then an important issue, which can be inferred from the decay products of VLQs, such as top quark. We calculate the spin-analyzing powers for charged leptons from top quark in VLQ decay for various VLQ scenarios. We find that the top polarization effect will be helpful to distinguish different natures of the VLQ couplings with the SM.

   hep-phPLB(2019)·7 citations
10. 10*

    Solar neutrino problem as evidence of new interaction

    L.M. Slad🇷🇺

    A new concept is proposed to solve the solar neutrino problem, that is based on a hypothesis about the existence of a new interaction of electron neutrinos with nucleons mediated by massless pseudoscalar bosons. At every collision of a neutrino with nucleons of the Sun, its handedness changes from left to right and vice versa, and its energy decreases. The postulated hypothesis, having only one free parameter, provides a good agreement between the calculated and experimental characteristics of all five observed processes with solar neutrinos.

    hep-phastro-ph.SRnucl-thJ.Exp.Theor.Phys.(2020)·9 citations
11. 11*

    Chiral phase structure and sixteen meson states in SU(3) Polyakov linear-sigma model at finite temperature and chemical potential in strong magnetic field

    Abdel Nasser Tawfik (Nile U., Cairo & Egyptian Ctr. Theor. Phys., Cairo & Frankfurt U., FIAS & WLCAPP, Cairo)🇪🇬 · Abdel Magied Diab (Egyptian Ctr. Theor. Phys., Cairo & WLCAPP, Cairo)🇪🇬 · T. M. Hussein (Cairo U.)🇪🇬

    In characterizing the chiral phase-structure of pseudoscalars ($J^{pc}=0^{-+}$), scalars ($J^{pc}=0^{++}$), vectors ($J^{pc}=1^{--}$) and axial-vectors ($J^{pc}=1^{++}$) meson states and their dependence on temperature, chemical potential, and magnetic fields, we utilize SU($3$) Polyakov linear-sigma model (PLSM) in mean-field approximation. We first determine the chiral (non)strange quark condensates, ${\sigma }_l$ and ${\sigma }_s$ and the corresponding deconfinement order parameters, $\varphi$ and ${\varphi }^{\ast }$, respectively, in thermal and dense (finite chemical potential) medium and finite magnetic field. The temperature and the chemical potential characteristics of nonet meson states normalized to the lowest {\it bosonic} Matsubara frequencies are analyzed. We noticed that all normalized meson masses become temperature independent at different {\it critical} temperatures. We observe that the chiral and deconfinement phase transitions are shifted to lower {\it quasicritical} temperatures with increasing chemical potential and magnetic field. Thus, we conclude that the magnetic field seems to have almost the same effect as that of the chemical potential, especially on accelerating the phase transition, i.e. inverse magnetic catalysis. We also find that increasing chemical potential enhances the mass degeneracy of the various meson masses, while increasing the magnetic field seems to reduce the critical chemical potential, at which the chiral phase transition takes place. Our mass spectrum calculations agree well with the recent PDG compilations and PNJL, lattice QCD calculations, and QMD/UrQMD simulations.

    hep-phhep-lathep-thCPC(2019)·26 citations
12. 12*

    Photoproduction of mixed radions at a proton-proton collider

    I. Sahin🇹🇷 · S. Spor🇹🇷 · D. Yilmaz🇹🇷 · G. Akkaya Selcin🇹🇷

    We investigate Higgs-radion mixing scenario through single radion photoproduction process $pp\to p\gamma p\to pRqX$ at the LHC where $X$ represents the remnants of one of the initial protons. We consider high luminosity values of $L_{int}=200f{b}^{-1}$, $500f{b}^{-1}$ and $3000f{b}^{-1}$. We obtain bounds on the mixing parameter space by considering $R\to \gamma \gamma$, $R\to W^{+}{W}^{-}$ and $R\to ZZ$ decay channels of the radion as the signal. We also perform a similar analysis for a 100 TeV future proton-proton collider and compare its potential with that of LHC.

    hep-phJ.Phys.G(2020)·3 citations
13. 13*

    The symmetry of $4\times 4$ mass matrices predicted by the spin-charge-family theory --- $SU(2)\times SU(2)\times U(1)$ --- remains in all loop corrections

    A. Hernandez-Galeana🇲🇽 · N.S. Mankoc Borstnik🇸🇮

    The spin-charge-family theory predicts the existence of the fourth family to the observed three. The $4\times 4$ mass matrices --- determined by the nonzero vacuum expectation values of the two triplet scalars, the gauge fields of the two groups of $\widetilde{SU}(2)$ determining family quantum numbers, and by the contributions of the dynamical fields of the two scalar triplets and the three scalar singlets with the family members quantum numbers (${\tau }^{\alpha }=(Q,Q^{\prime },Y^{\prime })$) --- manifest the symmetry $\widetilde{SU}(2)\times \widetilde{SU}(2)\times U(1)$. All scalars carry the weak and the hyper charge of the standard model higgs field ($\pm \frac{1}{2},\mp \frac{1}{2}$, respectively). It is demonstrated, using the massless spinor basis, that the symmetry of the $4\times 4$ mass matrices remains $SU(2)\times SU(2)\times U(1)$ in all loop corrections, and it is discussed under which conditions this symmetry is kept under all corrections, that is with the corrections induced by the repetition of the nonzero vacuum expectation values included.

    hep-phBled Workshops Phys.·5 citations
14. 14*

    Constraint to chiral invariant masses of nucleons from GW170817 in an extended parity doublet model

    Takahiro Yamazaki🇯🇵 · Masayasu Harada🇯🇵

    We construct nuclear matter based on an extended parity doublet model including four light nucleons $N(939)$, $N(1440)$, $N(1535)$, and $N(1650)$. We exclude some values of the chiral invariant masses by requiring the saturation properties of normal nuclear matter; saturation density, binding energy, incompressibility, and symmetry energy. We find further constraint to the chiral invariant masses from the tidal deformability determined by the observation of the gravitational waves from neutron star merger GW170817. Our result shows that the chiral invariant masses are larger than about $600$MeV. We also give some predictions on the symmetry energy and the slope parameters in the high density region, which will be measured in future experiments.

    ↳ nucl-thhep-phPRC(2019)·38 citations
15. 15*

    Enhancement factor for the electric dipole moment of the electron in the BaOH and YbOH molecules

    Malika Denis🇳🇱 · Pi A. B. Haase🇳🇱 · Rob G. E. Timmermans🇳🇱 · Ephraim Eliav🇮🇱 · Nicholas R. Hutzler🇺🇸 · Anastasia Borschevsky🇳🇱

    Polyatomic polar molecules are promising systems for future experiments that search for violation of time-reversal and parity symmetries due to their advantageous electronic and vibrational structure, which allows laser cooling, full polarisation of the molecule, and reduction of systematic effects [I. Kozyryev and N.R. Hutzler, Phys, Rev. Lett. {\bf 119}, 133002 (2017)]. In this work we investigate the enhancement factor of the electric dipole moment of the electron ($E_{\text{eff}}$) in the triatomic monohydroxide molecules BaOH and YbOH within the high-accuracy relativistic coupled cluster method. The recommended $E_{\text{eff}}$ values of the two systems are 6.65 $\pm$ 0.15 GV/cm and 23.4 $\pm$ 1.0 GV/cm, respectively. We compare our results with similar calculations for the isoelectronic diatomic molecules BaF and YbF, which are currently used in experimental search for $P,T$-odd effects in molecules. The $E_{\text{eff}}$ values prove to be very close, within about 1.5 $\%$ difference in magnitude between the diatomic and the triatomic compounds. Thus, BaOH and YbOH have a similar enhancement of the electron electric dipole moment, while benefiting from experimental advantages, and can serve as excellent candidates for next-generation experiments.

    ↳ physics.atom-phhep-phPRA(2019)·57 citations
16. 16*

    Quantum stability in open string theory with broken supersymmetry

    Herve Partouche🇫🇷

    We consider the 1-loop effective potential in type I string theory compactified on a torus, with supersymmetry broken by the Scherk-Schwarz mechanism. At fixed supersymmetry breaking scale M, and up to exponentially suppressed terms, we show that the potential admits local minima of arbitrary sign, in dimension d<=5. While the open string Wilson lines are massive, the closed string moduli are flat directions. In a T-dual picture, the relevant backgrounds involve isolated 1/2-branes, whose positions are frozen on orientifold planes, thus decreasing the rank of the gauge group, and introducing massless fermions in fundamental representations.

    ↳ hep-thgr-qchep-phJ.Phys.Conf.Ser.(2020)·7 citations
17. 17*

    Handling the Uncertainties in the Galactic Dark Matter Distribution for Particle Dark Matter Searches

    Maria Benito🇧🇷 · Alessandro Cuoco🇩🇪 · Fabio Iocco🇧🇷

    In this work we characterize the distribution of Dark Matter (DM) in the Milky Way (MW), and its uncertainties, adopting the well known "Rotation Curve" method. We perform a full marginalization over the uncertainties of the Galactic Parameters and over the lack of knowledge on the morphology of the baryonic components of the Galaxy. The local DM density rho0 is constrained to the range 0.3 - 0.8 GeV/cm3 at the 2 sigma level, and has a strong positive correlation to R0, the local distance from the Galactic Center (GC). The not well-known value of R0 is thus, at the moment, a major limitation in determining rho0. Similarly, we find that the inner slope of the DM profile, gamma, is very weakly constrained, showing no preference for a cored profile (gamma~0) or a cuspy one (gamma~[1.0,1.4]). Some combination of parameters can be, however, strongly constrained. For example the often used standard rho0=0.3 GeV/cm3, R0=8.5 kpc is excluded at more than 4 sigma. We release the full likelihood of our analysis in a tabular form over a multidimensional grid in the parameters characterizing the DM distribution, namely the scale radius Rs, the scale density rhos, the inner slope of the profile gamma, and R0. The likelihood can be used to include the effect of the DM distribution uncertainty on the results of searches for an indirect DM signal in gamma-rays or neutrinos, from the GC, or the Halo region surrounding it. As one example, we study the case of the GC excess in gamma rays. Further applications of our tabulated uncertainties in the DM distribution involve local DM searches, like direct detection and anti-matter observations, or global fits combining local and GC searches.

    ↳ astro-ph.GAhep-phJCAP(2019)·93 citations
18. 18*

    Electromagnetism and hidden vector fields in modified gravity theories: spontaneous and induced vectorization

    Lorenzo Annulli🇵🇹 · Vitor Cardoso🇵🇹 · Leonardo Gualtieri🇮🇹

    In general relativity, Maxwell's equations are embedded in curved spacetime through the minimal prescription, but this could change if strong-gravity modifications are present. We show that with a nonminimal coupling between gravity and a massless vector field, nonperturbative effects can arise in compact stars. We find solutions describing stars with nontrivial vector field configurations, some of which are associated to an instability, while others are not. The vector field can be interpreted either as the electromagnetic field, or as a hidden vector field weakly coupled with the standard model.

    ↳ gr-qcastro-ph.HEhep-phhep-thPRD(2019)·57 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.