Wed·May 4, 2016Wednesday·May 4, 2016

1. 01*

   Dark matter annihilation with s-channel internal Higgsstrahlung

   Jason Kumar🇺🇸 · Jiajun Liao🇺🇸 · Danny Marfatia🇺🇸

   We study the scenario of fermionic dark matter that annihilates to standard model fermions through an s-channel axial vector mediator. We point out that the well-known chirality suppression of the annihilation cross section can be alleviated by s-channel internal Higgsstrahlung. The shapes of the cosmic ray spectra are identical to that of t-channel internal Higgsstrahlung in the limit of a heavy mediating particle. Unlike the general case of t-channel bremsstrahlung, s-channel Higgsstrahlung can be the dominant annihilation process even for Dirac dark matter. Since the s-channel mediator can be a standard model singlet, collider searches for the mediator are easily circumvented.

   hep-phastro-ph.HEhep-exPLB(2016)·10 citations
2. 02*

   Aspects of pQCD at a 100 TeV future hadron collider

   Enrico Bothmann🇩🇪 · Piero Ferrarese🇩🇪 · Frank Krauss🇬🇧 · Silvan Kuttimalai🇬🇧 · Steffen Schumann🇩🇪 · Jennifer Thompson🇩🇪

   In this publication we consider particle production at a future circular hadron collider with 100 TeV centre of mass energy within the Standard Model, and in particular their QCD aspects. Accurate predictions for these processes pose severe theoretical challenges related to large hierarchies of scales and possible large multiplicities of final state particles. We investigate scaling patterns in multijet-production rates allowing to extrapolate predictions to very high final-state multiplicities. Furthermore, we consider large-area QCD jets and study the expectation for the mean number of subjets to be reconstructed from their constituents and confront these with analytical resummed predictions and with the expectation for boosted hadronic decays of top-quarks and W-bosons. We also discuss the validity of Higgs-Effective-Field-Theory in making predictions for Higgs-boson production in association with jets. Finally, we consider the case of New Physics searches at such a 100 TeV hadron-collider machine and discuss the expectations for corresponding Standard-Model background processes.

   hep-phPRD(2016)·10 citations
3. 03*

   Charged Higgs production in association with a top quark at approximate NNLO

   Nikolaos Kidonakis🇺🇸

   I present approximate next-to-next-to-leading-order (aNNLO) total and differential cross sections for charged Higgs production in association with a top quark at LHC energies. The aNNLO results for the process $bg\to t{H}^{-}$ are derived from next-to-next-to-leading-logarithm (NNLL) resummation of soft-gluon corrections. Scale and parton-distribution uncertainties for the cross sections are shown. The top-quark transverse-momentum and rapidity distributions are also calculated.

   hep-phPRD(2016)·18 citations
4. 04*

   Full angular spectrum analysis of tensor current contribution to $A_{cp}(\tau \to K_s\pi {\nu }_{\tau })$

   Lobsang Dhargyal🇮🇳

   Babar collaboration has reported an intriguing opposite sign in the integrated decay rate asymmetry $A_{cp}(\tau \to K_s\pi {\nu }_{\tau })$ than that of SM prediction from the known $K^0$ - $\overline{K^0}$ mixing. Babar's result deviate from the SM prediction by about 2.7$\sigma$. If the result stands with higher precision in the future experiments, the observed sign anomaly in the $A_{cp}(\tau \to K_s\pi {\nu }_{\tau })$ can most likely come only from a NP. In this work we present a full angular spectrum analysis on the contribution to $A_{cp}(\tau \to K_s\pi {\nu }_{\tau })$ coming from the tensorial term. Assuming the real part of the NP tensorial coupling is negligible compare to its imaginary part and with $A_{cp}(\tau \to K_s\pi {\nu }_{\tau })$ and $Br(\tau \to K_s\pi {\nu }_{\tau })$ as data points to fit the imaginary part of the NP coupling, we have been able to fit the result within 1$\sigma$ of the experimental values.

   hep-phLHEP(2018)·23 citations
5. 05*

   Depletion of intense fields

   D. Seipt🇩🇪 · T. Heinzl🇬🇧 · M. Marklund🇸🇪 · S. S. Bulanov🇺🇸

   The interaction of charged particles and photons with intense electromagnetic fields gives rise to multi-photon Compton and Breit-Wheeler processes. These are usually described in the framework of the external field approximation, where the electromagnetic field is assumed to have infinite energy. However, the multi-photon nature of these processes implies the absorption of a significant number of photons, which scales as the external field amplitude cubed. As a result, the interaction of a highly charged electron bunch with an intense laser pulse can lead to significant depletion of the laser pulse energy, thus rendering the external field approximation invalid. We provide relevant estimates for this depletion and find it to become important in the interaction between fields of amplitude $a_0\sim 10^3$ and electron bunches with charges of the order of 10 nC.

   hep-phphysics.plasm-phPRL(2017)·57 citations
6. 06*

   Production of keV Sterile Neutrinos in Supernovae: New Constraints and Gamma Ray Observables

   Carlos A. Argüelles🇺🇸 · Vedran Brdar🇩🇪 · Joachim Kopp🇩🇪

   We study the production of sterile neutrinos in supernovae, focusing in particular on the keV--MeV mass range, which is the most interesting range if sterile neutrinos are to account for the dark matter in the Universe. Focusing on the simplest scenario in which sterile neutrinos mixes only with muon or tau neutrino, we argue that the production of keV--MeV sterile neutrinos can be strongly enhanced by a Mikheyev--Smirnov--Wolfenstein (MSW) resonance, so that a substantial flux is expected to emerge from a supernova, even if vacuum mixing angles between active and sterile neutrinos are tiny. Using energetics arguments, this yields limits on the sterile neutrino parameter space that reach down to mixing angles of the order of ${\sin }^{2}2\theta \lesssim 10^{-14}$ and are up to an order of magnitude stronger than those from X-ray observations. While supernova limits suffer from larger systematic uncertainties than X-ray limits they apply also to scenarios in which sterile neutrinos are not abundantly produced in the early Universe. We also compute the flux of $\mathcal{O}(\text{MeV})$ photons expected from the decay of sterile neutrinos produced in supernovae, but find that it is beyond current observational reach even for a nearby supernova.

   hep-phastro-ph.HEPRD(2019)·87 citations
7. 07*

   Illuminating New Electroweak States at Hadron Colliders

   Ahmed Ismail🇺🇸 · Eder Izaguirre🇨🇦 · Brian Shuve🇺🇸

   In this paper, we propose a novel powerful strategy to perform searches for new electroweak states. Uncolored electroweak states appear in generic extensions of the Standard Model (SM) and yet are challenging to discover at hadron colliders. This problem is particularly acute when the lightest state in the electroweak multiplet is neutral and all multiplet components are approximately degenerate. In this scenario, production of the charged fields of the multiplet is followed by decay into nearly invisible states; if this decay occurs promptly, the only way to infer the presence of the reaction is through its missing energy signature. Our proposal relies on emission of photon radiation from the new charged states as a means of discriminating the signal from SM backgrounds. We demonstrate its broad applicability by studying two examples: a pure Higgsino doublet and an electroweak quintuplet field.

   hep-phhep-exPRD(2016)·28 citations
8. 08*

   Cosmological Aspects of Spontaneous Baryogenesis

   Andrea De Simone🇮🇹 · Takeshi Kobayashi🇮🇹

   We investigate cosmological aspects of spontaneous baryogenesis driven by a scalar field, and present general constraints that are independent of the particle physics model. The relevant constraints are obtained by studying the backreaction of the produced baryons on the scalar field, the cosmological expansion history after baryogenesis, and the baryon isocurvature perturbations. We show that cosmological considerations alone provide powerful constraints, especially for the minimal scenario with a quadratic scalar potential. Intriguingly, we find that for a given inflation scale, the other parameters including the reheat temperature, decoupling temperature of the baryon violating interactions, and the mass and decay constant of the scalar are restricted to lie within ranges of at most a few orders of magnitude. We also discuss possible extensions to the minimal setup, and propose two ideas for evading constraints on isocurvature perturbations: one is to suppress the baryon isocurvature with nonquadratic scalar potentials, another is to compensate the baryon isocurvature with cold dark matter isocurvature by making the scalar survive until the present.

   hep-phastro-ph.COhep-thJCAP(2016)·68 citations
9. 09*

   Relating Transverse Momentum Dependent and Collinear Factorization Theorems in a Generalized Formalism

   J. Collins🇺🇸 · L. Gamberg🇺🇸 · A. Prokudin🇺🇸 · T. C. Rogers🇺🇸 · N. Sato🇺🇸 · B. Wang🇺🇸

   We construct an improved implementation for combining transverse-momentum-dependent (TMD) factorization and collinear factorization. TMD factorization is suitable for low transverse momentum physics, while collinear factorization is suitable for high transverse momenta and for a cross section integrated over transverse momentum. The result is a modified version of the standard $W+Y$ prescription traditionally used in the Collins-Soper-Sterman (CSS) formalism and related approaches. We further argue that questions regarding the shape and $Q$-dependence of the cross sections at lower $Q$ are largely governed by the matching to the $Y$-term.

   hep-phPRD(2016)·130 citations
10. 10*

    The Effect of a Rapidity Gap Veto on the Discrete BFKL Pomeron

    Douglas A. Ross🇬🇧 · Agustin Sabio Vera🇪🇸

    We investigate the sensitivity of the discrete BFKL spectrum, which appears in the gluon Green function when the running coupling is considered, to a lower cut-off in the relative rapidities of the emitted particles. We find that the eigenvalues associated to each of the discrete eigenfunctions decrease with the size of the rapidity veto. The effect is stronger on the lowest eigenfunctions. The net result is a reduction of the growth with energy for the Green function together with a suppression in the regions with small transverse momentum.

    hep-phPLB(2016)·6 citations
11. 11*

    No-Scale $\mu$-Term Hybrid Inflation

    Lina Wu🇨🇳 · Shan Hu🇨🇳 · Tianjun Li🇨🇳

    To solve the fine-tuning problem in $\mu$-Term Hybrid Inflation, we will realize the supersymmetry scenario with the TeV-scale supersymmetric particles and intermediate-scale gravitino from anomaly mediation, which can be consistent with the WMAP and Planck experiments. Moreover, we for the first time propose the $\mu$-term hybrid inflation in no-scale supergravity. With four Scenarios for the $SU(3{)}_C\times SU(2{)}_L\times SU(2{)}_R\times U(1{)}_{B-L}$ model, we show that the correct scalar spectral index $n_s$ can be obtained, while the tensor-to-scalar ratio $r$ is prediced to be tiny, about $10^{-10}-10^{-8}$. Also, the $SU(2{)}_R\times U(1{)}_{B-L}$ symmetry breaking scale is around $10^{14}$ GeV, and all the supersymmetric particles except gravitino are around TeV scale while gravitino mass is around $10^{9-10}$ GeV. Considering the complete potential terms linear in $S$, we for the first time show that the tadpole term, which is the key for such kind of inflationary models to be consistent with the observed scalar spectral index, vanishes after inflation. Thus, to obtain the $\mu$ term, we need to generate the supersymmetry breaking soft term $A_{\kappa }^{S\Phi {\Phi }^{\prime }}\kappa S\Phi {\Phi }^{\prime }$ due to $A_{\kappa }^{S\Phi {\Phi }^{\prime }}=0$ in no-scale supergravity, where $\Phi$ and ${\Phi }^{\prime }$ are vector-like Higgs fields at high energy. We show that the proper $A_{\kappa }^{S\Phi {\Phi }^{\prime }}\kappa S\Phi {\Phi }^{\prime }$ term can be obtained in the M-theory inspired no-scale supergravity. We also point out that $A_{\kappa }^{S\Phi {\Phi }^{\prime }}$ around 700 GeV can be generated via the renormalization group equation running from string scale.

    hep-phEPJC(2017)·13 citations
12. 12*

    Spectral functions and in-medium properties of hadrons

    Ralf-Arno Tripolt🇮🇹 · Lorenz von Smekal🇩🇪 · Jochen Wambach🇮🇹

    The in-medium modifications of hadron properties such as masses and decay widths have been a major focus of the scientific work of Gerry Brown and the insights gained by him and his collaborators made them major drivers of this field for several decades. Their prediction of experimental signals in di-lepton pair production in relativistic heavy-ion collisions were instrumental in initiating large experimental campaigns which continue until today. In this chapter we review recent results which elucidate the relation of hadronic spectral properties at finite temperature and density to the restoration of spontaneously broken chiral symmetry.

    hep-phhep-thnucl-thIJMPE(2017)·22 citations
13. 13*

    Proceedings of the 2013 CERN - Latin-American School of High-Energy Physics (CLASHEP 2013), Arequipa, Peru, 6-19 Mar 2013

    M. Mulders (CERN)🇨🇭 · G.Perez (CERN)🇨🇭

    The CERN - Latin-American School of High-Energy Physics is intended to give young physicists an introduction to the theoretical aspects of recent advances in elementary particle physics. These proceedings contain lecture notes on the Standard Model of electroweak interactions, quantum chromodynamics, flavour physics, quantum chromodynamics under extreme conditions, cosmic-ray physics, cosmology, recent highlights of LHC results, practical statistics for particle physicists and a short introduction to the principles of particle physics instrumentation.

    hep-ph7 citations
14. 14*

    Generating nonzero ${\theta }_{13}$ without breaking the $2$-$3$ symmetry of neutrino mass matrix

    Subhankar Roy🇮🇳 · N. Nimai Singh🇮🇳

    The prediction of vanishing reactor angle was thought to be a signature of $2$-$3$ symmetry of neutrino mass matrix. But the present study addresses certain interesting facts related with $2$-$3$ symmetry which are not addressed so far. The investigation highlights that ${\theta }_{13}=0$, corresponds to a very special case in association with $2$-$3$ symmetry and to engender a non-zero ${\theta }_{13}$, the breakdown of $2$-$3$ symmetry is not essential.

    hep-ph0 citations
15. 15*

    Transverse pion structure beyond leading twist in constituent models

    C. Lorcé (Ecole Polytechnique, CPHT)🇫🇷 · B. Pasquini (Pavia U. & INFN, Pavia)🇮🇹 · P. Schweitzer (Connecticut U. and Tubingen U.)🇺🇸

    The understanding of the pion structure as described in terms of transverse-momentum dependent parton distribution functions (TMDs) is of importance for the interpretation of currently ongoing Drell-Yan experiments with pion beams. In this work we discuss the description of pion TMDs beyond leading twist in a pion model formulated in the light-front constituent framework. For comparison, we also review and derive new results for pion TMDs in the bag and spectator models.

    hep-phhep-exnucl-exnucl-thEPJC(2016)·48 citations
16. 16*

    Single top and Higgs associated production in the minimal $B-L$ model at the LHC

    Bingfang Yang🇨🇳 · Zhiyong Liu🇨🇳 · Jinzhong Han🇨🇳 · Guang Yang🇨🇳

    In this paper, we study the single top production in association with a Higgs boson in the $U(1{)}_{B-L}$ extension of the Standard Model at the LHC. We calculate the production cross sections of the processes $pp\to thX(h=H_1,H_2;X=j,b,W)$ in this model. Then we further study the observability of the process $pp\to t{H}_{2}j$ through $pp\to t(\to q\overline{q^{\prime }}b)H_2(\to 4\ell )j$. We find that the systematic significance can be improved obviously, but it is still challenging for the 14 TeV LHC with high-luminosity to detect this signal.

    hep-phAdv.High Energy Phys.(2016)·2 citations
17. 17*

    Flavor structure in $SO(32)$ heterotic string theory

    Hiroyuki Abe🇯🇵 · Tatsuo Kobayashi🇯🇵 · Hajime Otsuka🇯🇵 · Yasufumi Takano🇯🇵 · Takuya H. Tatsuishi🇯🇵

    We study the flavor structure in $SO(32)$ heterotic string theory on six-dimensional torus with magnetic fluxes. In particular, we focus on models with the flavor symmetries $SU(3{)}_f$ and $\Delta (27)$. In both models, we can realize the realistic quark masses and mixing angles.

    hep-phhep-thPRD(2016)·13 citations
18. 18*

    Terrestrial matter effects on reactor antineutrino oscillations at JUNO or RENO-50: how small is small?

    Yu-Feng Li🇨🇳 · Yifang Wang🇨🇳 · Zhi-zhong Xing🇨🇳

    We have carefully examined, in both analytical and numerical ways, how small the terrestrial matter effects can be in a given medium-baseline reactor antineutrino oscillation experiment like JUNO or RENO-50. Taking the ongoing JUNO experiment for example, we show that the inclusion of terrestrial matter effects may reduce the sensitivity of the neutrino mass ordering measurement by \Delta \chi^2_{\rm MO} \simeq 0.6, and a neglect of such effects may shift the best-fit values of the flavor mixing angle \theta_{12} and the neutrino mass-squared difference \Delta_{21} by about 1\sigma to 2\sigma in the future data analysis. In addition, a preliminary estimate indicates that a 2\sigma sensitivity of establishing the terrestrial matter effects can be achieved for about 10 years of data taking at JUNO with the help of a proper near detector implementation.

    hep-phhep-exCPC(2016)·59 citations
19. 19*

    Chiral spin-3/2 particles in a medium

    José F. Nieves🇺🇸 · Sarira Sahu🇲🇽

    We consider the propagation of a chiral spin-3/2 particle in a background medium using the Thermal Field Theory (TFT) method, in analogy to the cases of a spin-1/2 fermion (e.g., a neutrino) and the photon. We present a systematic decomposition of the thermal self-energy, from which the dispersion relation of the modes that propagate in the medium are obtained. We find that there are several modes and in each case we obtain the equation for the dispersion relation as well as the corresponding spin-3/2 spinor. As an example of the general procedure and results, we consider a model in which the chiral spin-3/2 particle couples to a spin-1/2 fermion and a scalar particle, and propagates in a thermal background composed of such particles. The dispersion relations and corresponding spinors are detemined explcitly in this case from the 1-loop TFT expression for the self-energy. The results in this case share some resemblance and analogies with the photon and the chiral fermion cases but, as already noted, there are also differences. The present work provides the groundwork for considering problems related to the properties of chiral spin-3/2 particles in a medium, in analogy to the case of neutrinos for example, which can be relevant in physical contexts of current interest.

    hep-phPRD(2016)·0 citations
20. 20*

    Gauge $B-L$ Model of Radiative Neutrino Mass with Multipartite Dark Matter

    Ernest Ma🇺🇸 · Nicholas Pollard🇺🇸 · Oleg Popov🇺🇸 · Mohammadreza Zakeri🇺🇸

    We propose an extension of the standard model of quarks and leptons to include gauge $B-L$ symmetry with an exotic array of neutral fermion singlets for anomaly cancellation. With the addition of suitable scalars also transforming under $U(1{)}_{B-L}$, this becomes a model of radiative seesaw neutrino mass with possible multipartite dark matter. If leptoquark fermions are added, necessarily also transforming under $B-L$, the diphoton excess at 750 GeV, recently observed at the Large Hadron Collider, may also be explained.

    hep-phMod.Phys.Lett.A(2016)·29 citations
21. 21*

    Nucleon to $\Delta$ transition form factors and empirical transverse charge densities

    Dipankar Chakrabarti🇮🇳 · Chandan Mondal🇮🇳

    We investigate the nucleon to $\Delta$ transition form factors in a soft-wall AdS/QCD model and a light-front quark-diquark model inspired by AdS/QCD. From the transition form factors we evaluate the transition charge densities which influences the nucleon to $\Delta$ excitation. Here we consider both the unpolarized and the transversely polarized cases. The AdS/QCD predictions are compared with available experimental data and with the results of the global parameterization, MAID2007.

    hep-phEPJA(2016)·9 citations
22. 22*

    Lattice Gluon and Ghost Propagators, and the Strong Coupling in Pure SU(3) Yang-Mills Theory: Finite Lattice Spacing and Volume Effects

    Anthony G. Duarte🇵🇹 · Orlando Oliveira🇵🇹 · Paulo J. Silva🇵🇹

    The dependence of the Landau gauge two point gluon and ghost correlation functions on the lattice spacing and on the physical volume are investigated for pure SU(3) Yang-Mills theory in four dimensions using lattice simulations. We present data from very large lattices up to $128^4$ and for two lattice spacings $0.10$ fm and $0.06$ fm corresponding to volumes of $\sim$ (13 fm)${}^4$ and $\sim$ (8 fm)${}^4$, respectively. Our results show that, for sufficiently large physical volumes, both propagators have a mild dependence on the lattice volume. On the other hand, the gluon and ghost propagators change with the lattice spacing $a$ in the infrared region, with the gluon propagator having a stronger dependence on $a$ compared to the ghost propagator. In what concerns the strong coupling constant ${\alpha }_s(p^2)$, as defined from gluon and ghost two point functions, the simulations show a sizeable dependence on the lattice spacing for the infrared region and for momenta up to $\sim 1$ GeV.

    ↳ hep-lathep-phhep-thPRD(2016)·148 citations
23. 23*

    Quasi-long-range order in trapped two-dimensional Bose gases

    Igor Boettcher🇩🇪 · Markus Holzmann🇫🇷

    We study the fate of algebraic decay of correlations in a harmonically trapped two-dimensional degenerate Bose gas. The analysis is inspired by recent experiments on ultracold atoms where power-law correlations have been observed despite the presence of the external potential. We generalize the spin wave description of phase fluctuations to the trapped case and obtain an analytical expression for the one-body density matrix within this approximation. We show that algebraic decay of the central correlation function persists to lengths of about 20% of the Thomas--Fermi radius. We establish that the trap-averaged correlation function decays algebraically with a strictly larger exponent weakly changing with trap size and find indications that the recently observed enhanced scaling exponents receive significant contributions from the normal component of the gas. We discuss radial and angular correlations and propose a local correlation approximation which captures the correlations very well. Our analysis goes beyond the usual local density approximation and the developed summation techniques constitute a powerful tool to investigate correlations in inhomogeneous systems.

    ↳ cond-mat.quant-gascond-mat.stat-mechhep-phmath-ph+1PRA(2016)·9 citations
24. 24*

    On the Light dilaton in the Large N Tri-critical O(N) Model

    Hamid Omid🇨🇦 · Gordon W. Semenoff🇨🇦 · L.C.R. Wijewardhana🇺🇸

    The leading order of the large N limit of the O(N) symmetric phi-six theory in three dimensions has a phase which exhibits spontaneous breaking of scale symmetry accompanied by a massless dilaton which is a Goldstone boson. At the next-to-leading order in large N, the phi-six coupling has a beta function of order 1/N and it is expected that the dilaton acquires a small mass, proportional to the beta function and the condensate. In this note, we show that this "light dilaton" is actually a tachyon. This indicates an instability of the phase of the theory with spontaneously broken approximate scale invariance.

    ↳ hep-thcond-mat.stat-mechhep-phPRD(2016)·30 citations
25. 25*

    Gravitational Wave for a pedestrian

    A K Chaudhuri🇮🇳

    The physics of gravitational wave and its detection in the recent experiment by the LIGO collaboration is discussed in simple terms for a general audience. The main article is devoid of any mathematics, but an appendix is included for inquisitive readers where essential mathematics for general theory of relativity and gravitational waves are given.

    ↳ physics.pop-phastro-ph.HEhep-exhep-ph+13 citations
26. 26*

    Radiative trapping in intense laser beams

    J. G. Kirk🇩🇪

    The dynamics of electrons in counter-propagating, circularly polarized laser beams are shown to exhibit attractors whose ability to trap particles depends on the ratio of the beam intensities and a single parameter describing radiation reaction. Analytical expressions are found for the underlying limit cycles and the parameter range in which they are stable. In high-intensity optical pulses, where radiation reaction strongly modifies the trajectories, the production of collimated gamma-rays and the initiation of non-linear cascades of electron-positron pairs can be optimized by a suitable choice of the intensity ratio.

    ↳ physics.plasm-phhep-phPlasma Phys.Control.Fusion(2016)·34 citations
27. 27*

    Search for $XYZ$ states in ${\rm Y}(1S)$ inclusive decays

    Belle Collaboration: C. P. Shen🇨🇳 · C. Z. Yuan🇨🇳 · Y. Ban🇨🇳 · H. Aihara🇯🇵 · D. M. Asner🇺🇸 · I. Badhrees🇸🇦 · A. M. Bakich🇦🇺 · E. Barberio🇦🇺 · P. Behera🇮🇳 · V. Bhardwaj🇮🇳 · B. Bhuyan🇮🇳 · J. Biswal🇸🇮 and 142 other authors

    The branching fractions of the ${\rm Y}(1S)$ inclusive decays into final states with a $J/\psi$ or a $\psi (2S)$ are measured with improved precision to be $\text{BR}({\rm Y}(1S)\to J/\psi +\mathrm{anything})=(5.25\pm 0.13(stat.)\pm 0.25(syst.))\times 10^{-4}$ and $\text{BR}({\rm Y}(1S)\to \psi (2S)+\mathrm{anything})=(1.23\pm 0.17(stat.)\pm 0.11(syst.))\times 10^{-4}$. The first search for ${\rm Y}(1S)$ decays into $XYZ$ states that decay into a $J/\psi$ or a $\psi (2S)$ plus one or two charged tracks yields no significant signals for $XYZ$ states in any of the examined decay modes, and upper limits on their production rates in ${\rm Y}(1S)$ inclusive decays are determined.

    ↳ hep-exhep-phPRD(2016)·13 citations
28. 28*

    Quantum Field Theory of Interacting Dark Matter/Dark Energy: Dark Monodromies

    Guido D'Amico🇨🇭 · Teresa Hamill🇺🇸 · Nemanja Kaloper🇺🇸

    We discuss how to formulate a quantum field theory of dark energy interacting with dark matter. We show that the proposals based on the assumption that dark matter is made up of heavy particles with masses which are very sensitive to the value of dark energy are strongly constrained. Quintessence-generated long range forces and radiative stability of the quintessence potential require that such dark matter and dark energy are completely decoupled. However, if dark energy and a fraction of dark matter are very light axions, they can have significant mixings which are radiatively stable and perfectly consistent with quantum field theory. Such models can naturally occur in multi-axion realizations of monodromies. The mixings yield interesting signatures which are observable and are within current cosmological limits but could be constrained further by future observations.

    ↳ hep-thastro-ph.COgr-qchep-phPRD(2016)·99 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.