Thu·Jan 21, 2016Thursday·January 21, 2016

1. 01*

   Renormalizable Model for Neutrino Mass, Dark Matter, Muon $g-2$ and 750 GeV Diphoton Excess

   Hiroshi Okada🇹🇼 · Kei Yagyu🇬🇧

   We discuss a possibility to explain the 750 GeV diphoton excess observed at the LHC in a three-loop neutrino mass model which has a similar structure to the model by Krauss, Nasri and Trodden. Tiny neutrino masses are naturally generated by the loop effect of new particles with their couplings and masses to be of order 0.1-1 and TeV, respectively. The lightest right-handed neutrino, which runs in the three-loop diagram, can be a dark matter candidate. In addition, the deviation in the measured value of the muon anomalous magnetic moment from its prediction in the standard model can be compensated by one-loop diagrams with exotic multi-charged leptons and scalar bosons. For the diphoton event, an additional isospin singlet real scalar field plays the role to explain the excess by taking its mass of 750 GeV, where it is produced from the gluon fusion production via the mixing with the standard model like Higgs boson. We find that the cross section of the diphoton process can be obtained to be a few fb level by taking the masses of new charged particles to be about 375 GeV and related coupling constants to be order 1.

   hep-phPLB(2016)·48 citations
2. 02*

   A realistic model for Dark Matter interactions in the neutrino portal paradigm

   Vannia González-Macías🇺🇸 · José I. Illana🇪🇸 · José Wudka🇺🇸

   We discuss a simple extension of the Standard Model (SM) that provides an explicit realization of the dark-matter (DM) neutrino-portal paradigm. The dark sector is composed of a scalar $\Phi$ and a Dirac fermion $\Psi$, with the latter assumed to be lighter than the former. These particles interact with the SM through the exchange of a set of heavy Dirac fermion mediators that are neutral under all local SM symmetries, and also under the dark-sector symmetry that stabilizes the $\Psi$ against decay. We show that this model can accommodate all experimental and observational constraints provided the DM mass is below $\sim 35\text{gev}$ or is in a resonant region of the Higgs or $Z$ boson. We also show that if the dark scalar and dark fermion are almost degenerate in mass, heavier DM fermions are not excluded. We note that in this scenario DM annihilation in the cores of astrophysical objects and the galactic halo produces a monochromatic neutrino beam of energy $\text{mfe}$, which provides a clear signature for this paradigm. Other experimental signatures are also discussed.

   hep-phJHEP(2016)·66 citations
3. 03*

   A 3-3-1 model with right-handed neutrinos based on the $\Delta \left(27\right)$ family symmetry

   A. E. Cárcamo Hernández🇨🇱 · H. N. Long🇻🇳 · V. V. Vien🇻🇳

   We present the first multiscalar singlet extension of the 3-3-1 model with right-handed neutrinos, based on the $\Delta \left(27\right)$ family symmetry, supplemented by the $Z_4\otimes Z_8\otimes Z_{14}$ flavor group, consistent with current low energy fermion flavor data. In the model under consideration, the light active neutrino masses are generated from a double seesaw mechanism and the observed pattern of charged fermion masses and quark mixing angles is caused by the breaking of the $\Delta \left(27\right)\otimes Z_4\otimes Z_8\otimes Z_{14}$ discrete group at very high energy. Our model has only 14 effective free parameters, which are fitted to reproduce the experimental values of the 18 physical observables in the quark and lepton sectors. The obtained physical observables for the quark sector agree with their experimental values, whereas those ones for the lepton sector also do, only for the inverted neutrino mass hierarchy. The normal neutrino mass hierarchy scenario of the model is disfavored by the neutrino oscillation experimental data. We find an effective Majorana neutrino mass parameter of neutrinoless double beta decay of $m_{\beta \beta }=$ 22 meV, a leptonic Dirac CP violating phase of $34^{\circ }$ and a Jarlskog invariant of about $10^{-2}$ for the inverted neutrino mass spectrum.

   hep-phEPJC(2016)·61 citations
4. 04*

   Testing the 2-TeV Resonance with Trileptons

   Arindam Das🇺🇸 · Natsumi Nagata🇺🇸 · Nobuchika Okada🇺🇸

   The CMS collaboration has reported a 2.8$\sigma$ excess in the search of the SU(2)${}_R$ gauge bosons decaying through right-handed neutrinos into the two electron plus two jets ($eejj$) final states. This can be explained if the SU(2)${}_R$ charged gauge bosons $W_R^{\pm }$ have a mass of around 2 TeV and a right-handed neutrino with a mass of $\mathcal{O}(1)$ TeV mainly decays to electron. Indeed, recent results in several other experiments, especially that from the ATLAS diboson resonance search, also indicate signatures of such a 2 TeV gauge boson. However, a lack of the same-sign electron events in the CMS $eejj$ search challenges the interpretation of the right-handed neutrino as a Majorana fermion. Taking this situation into account, in this paper, we consider a possibility of explaining the CMS $eejj$ excess based on the $SU(2{)}_L\otimes SU(2{)}_R\otimes U(1{)}_{B-L}$ gauge theory with pseudo-Dirac neutrinos. We find that both the CMS excess events and the ATLAS diboson anomaly can actually be explained in this framework without conflicting with the current experimental bounds. This setup in general allows sizable left-right mixing in both the charged gauge boson and neutrino sectors, which enables us to probe this model through the trilepton plus missing-energy search at the LHC. It turns out that the number of events in this channel predicted in our model is in good agreement with that observed by the CMS collaboration. We also discuss prospects for testing this model at the LHC Run-II experiments.

   hep-phJHEP(2016)·43 citations
5. 05*

   Inside the Hydrogen Atom

   M. Nowakowski🇨🇴 · N. G. Kelkar🇨🇴 · D. Bedoya Fierro🇨🇴 · A. D. Bermudez Manjarres🇨🇴

   We apply the non-linear Euler-Heisenberg theory to calculate the electric field inside the hydrogen atom. We will demonstrate that the electric field calculated in the Euler-Heisenberg theory can be much smaller than the corresponding field emerging from the Maxwellian theory. In the hydrogen atom this happens only at very small distances. This effect reduces the large electric field inside the hydrogen atom calculated from the electromagnetic form-factors via the Maxwell equations. The energy content of the field is below the pair production threshold.

   hep-phphysics.atom-phActa Phys.Polon.B(2016)·1 citation
6. 06*

   Probing Atomic Higgs-like Forces at the Precision Frontier

   Cédric Delaunay🇫🇷 · Roee Ozeri🇮🇱 · Gilad Perez🇮🇱 · Yotam Soreq🇺🇸

   We propose a novel approach to probe new fundamental interactions using isotope shift spectroscopy in atomic clock transitions. As concrete toy example we focus on the Higgs boson couplings to the building blocks of matter: the electron and the up and down quarks. We show that the attractive Higgs force between nuclei and their bound electrons, that is poorly constrained, might induce effects that are larger than the current experimental sensitivities. More generically, we discuss how new interactions between the electron and the neutrons, mediated via light new degrees of freedom, may lead to measurable non-linearities in a King plot comparison between isotope shifts of two different transitions. Given state-of-the-art accuracy in frequency comparison, isotope shifts have the potential of being measured with sub-Hz accuracy, thus potentially enabling the improvement of current limits on new fundamental interactions. Candidate atomic system for this measurement require two different clock transitions and four zero nuclear spin isotopes. We identify several systems that satisfy this requirement and also briefly discuss existing measurements. We consider the size of the effect related to the Higgs force and the requirements for it to produce an observable signal.

   hep-phphysics.atom-phquant-phPRD(2017)·138 citations
7. 07*

   Factorization and Resummation for Generic Hierarchies between Jets

   Piotr Pietrulewicz🇩🇪 · Frank J. Tackmann🇩🇪 · Wouter J. Waalewijn🇳🇱

   Jets are an important probe to identify the hard interaction of interest at the LHC. They are routinely used in Standard Model precision measurements as well as in searches for new heavy particles, including jet substructure methods. In processes with several jets, one typically encounters hierarchies in the jet transverse momenta and/or dijet invariant masses. Large logarithms of the ratios of these kinematic jet scales in the cross section are at present primarily described by parton showers. We present a general factorization framework called SCET${}_{+}$, which is an extension of Soft-Collinear Effective Theory (SCET) and allows for a systematic higher-order resummation of such kinematic logarithms for generic jet hierarchies. In SCET${}_{+}$ additional intermediate soft/collinear modes are used to resolve jets arising from additional soft and/or collinear QCD emissions. The resulting factorized cross sections utilize collinear splitting amplitudes and soft gluon currents and fully capture spin and color correlations. We discuss how to systematically combine the different kinematic regimes to obtain a complete description of the jet phase space. To present its application in a simple context, we use the case of $e^{+}{e}^{-}\to$3 jets. We then discuss in detail the application to N-jet processes at hadron colliders, considering representative classes of hierarchies from which the general case can be built. This includes in particular multiple hierarchies that are either strongly ordered in angle or energy or not.

   hep-phnucl-thJHEP(2016)·49 citations
8. 08*

   Secluded singlet fermionic dark matter driven by the Fermi gamma-ray excess

   Yeong Gyun Kim🇰🇷 · Kang Young Lee🇰🇷 · Chan Beom Park🇰🇷 · Seodong Shin🇺🇸

   We examine the possibility that the dark matter (DM) interpretation of the GeV scale Fermi gamma-ray excess at the Galactic Center can be realized in a specific framework - secluded singlet fermionic dark matter model with small mixing between the dark and Standard Model sector. Within this framework it is shown that the DM annihilation into bottom-quark pair, Higgs pair, and new scalar pair can give good fits to the Fermi gamma-ray data. Moreover unavoidable constraints from the antiproton ratio by the PAMELA and AMS-02, the gamma-ray emission from the dwarf spheroidal galaxies by the Fermi-LAT, and the Higgs measurements by the LHC are also considered. Then we found our best-fit parameters for the Fermi gamma-ray excess without conflicting other experimental and cosmological constraints if uncertainties on the DM density profile of the Milky Way Galaxy are taken into account. Successfully surviving parameters are benchmark points for future study on the collider signals.

   hep-phPRD(2016)·56 citations
9. 09*

   Bottomonium spectrum revisited

   Jorge Segovia🇩🇪 · Pablo G. Ortega🇨🇭 · David R. Entem🇪🇸 · Francisco Fernández🇪🇸

   We revisit the bottomonium spectrum motivated by the recently exciting experimental progress in the observation of new bottomonium states, both conventional and unconventional. Our framework is a nonrelativistic constituent quark model which has been applied to a wide range of hadronic observables from the light to the heavy quark sector and thus the model parameters are completely constrained. Beyond the spectrum, we provide a large number of electromagnetic, strong and hadronic decays in order to discuss the quark content of the bottomonium states and give more insights about the better way to determine their properties experimentally.

   hep-phhep-exhep-latnucl-thPRD(2016)·151 citations
10. 10*

    Randomness in the Dark Sector: Emergent Mass Spectra and Dynamical Dark Matter Ensembles

    Keith R. Dienes🇺🇸 · Jacob Fennick🇺🇸 · Jason Kumar🇺🇸 · Brooks Thomas🇺🇸

    In general, non-minimal models of the dark sector such as Dynamical Dark Matter posit the existence of an ensemble of individual dark components with differing masses, cosmological abundances, and couplings to the Standard Model. Perhaps the most critical among these features is the spectrum of masses, as this goes a long way towards determining the cosmological abundances and lifetimes of the corresponding states. Many different underlying theoretical structures can be imagined for the dark sector, each giving rise to its own mass spectrum and corresponding density of states. In this paper, by contrast, we investigate the spectrum of masses that emerges statistically from underlying processes which are essentially random. We find a density of states $n(m)$ which decreases as a function of mass and actually has an upper limit $m_{\max }$ beyond which $n(m)=0$. We also demonstrate that this "emergent" density of states is particularly auspicious from the perspective of the Dynamical Dark Matter framework, leading to cosmological abundances and decay widths that are suitably balanced against each other across the dark-matter ensemble. Thus randomness in the dark sector coexists quite naturally with Dynamical Dark Matter, and we examine the prospects for observing the signals of such scenarios in dark-matter indirect-detection experiments.

    hep-phastro-ph.COhep-thPRD(2016)·22 citations
11. 11*

    Searching for new spin-0 resonances at LHCb

    Ulrich Haisch🇬🇧 · Jernej F. Kamenik🇸🇮

    We study the phenomenology of light spin-0 particles and stress that they can be efficiently searched for at the LHCb experiment in the form of dimuon resonances. Given the large production cross sections in the forward rapidity region together with the efficient triggering and excellent mass resolution, it is argued that LHCb can provide unique sensitivity to such states. We illustrate our proposal using the recent measurement of Upsilon production by LHCb, emphasising the importance of mixing effects in the bottomonium resonance region. The implications for dimuon decays of spin-0 bottomonium states are also briefly discussed.

    hep-phhep-exPRD(2016)·35 citations
12. 12*

    Pomeron and Odderon Regge Trajectories from a Dynamical Holographic Model

    Eduardo Folco Capossoli🇧🇷 · Danning Li🇨🇳 · Henrique Boschi-Filho🇧🇷

    In this work we use gauge/string dualities and a dynamical model that takes into account dynamical corrections to the metric of the anti de Sitter space due to a quadratic dilaton field and calculate the masses of even and odd spin glueball states with $P=C=+1$, and $P=C=-1$, respectively. Then we construct the corresponding Regge trajectories which are associated with the pomeron for even states with $P=C=+1$, and with the odderon for odd states with $P=C=-1$. We compare our results with those coming from experimental data as well as other models.

    hep-phhep-thPLB(2016)·30 citations
13. 13*

    The Multiverse and Particle Physics

    John F. Donoghue🇺🇸

    The possibility of fundamental theories with very many ground states, each with different physical parameters, changes the way that we approach the major questions of particle physics. Most importantly, it raises the possibility that these different parameters could be realised in different domains in the larger universe. In this review, we survey the motivations for the multiverse and impact of the idea of the multiverse on the search for new physics beyond the Standard Model.

    hep-phgr-qchep-thAnn.Rev.Nucl.Part.Sci.(2016)·37 citations
14. 14*

    Glueball dynamics in the hot plasma

    Nikolai Kochelev🇷🇺

    We discuss the glueball contribution to the equation of state (EoS) of hot gluon matter below and above $T_c$. It is shown that the strong changing of masses of scalar and pseudoscalar glueballs near $T_c$ plays very important role in the thermodynamics of $SU(3)$ gauge theory. In particular, we give the arguments that these glueballs become massless at $T_G\approx 1.1T_c$ and this phenomenon is crucial in understanding of the mystery in the behavior of trace anomaly founded in the lattice calculation.

    hep-phhep-exnucl-exnucl-thEPJA(2016)·1 citation
15. 15*

    Vacuum stability and naturalness in type-II seesaw

    Naoyuki Haba🇯🇵 · Hiroyuki Ishida🇯🇵 · Nobuchika Okada🇺🇸 · Yuya Yamaguchi🇯🇵

    We study the vacuum stability and perturbativity conditions in the minimal type-II seesaw model. These conditions give characteristic constraints to model parameters. In the model, there is a $SU(2{)}_L$ triplet scalar field, which could cause a large Higgs mass correction. From the naturalness point of view, heavy Higgs masses should be lower than $350\mathrm{GeV}$, which can be testable by the LHC Run-II results. Due to effects of the triplet scalar field, branching ratios of the Higgs decay ($h\to \gamma \gamma ,Z\gamma$) deviate from the standard model, and large parameter region is excluded by the recent ATLAS and CMS combined analysis of $h\to \gamma \gamma$. Our result of the signal strength for $h\to \gamma \gamma$ is $R_{\gamma \gamma }\lesssim 1.1$, but its deviation is too small to observe at the LHC experiment.

    hep-phEPJC(2016)·39 citations
16. 16*

    Indication of a Differential Freeze-out in Proton-Proton and Heavy-Ion Collisions at RHIC and LHC energies

    Dhananjaya Thakur🇮🇳 · Sushanta Tripathy🇮🇳 · Prakhar Garg🇮🇳 · Raghunath Sahoo🇮🇳 · Jean Cleymans🇿🇦

    The experimental data from the RHIC and LHC experiments of invariant pT spectra in A+A and p + p collisions are analysed with Tsallis distributions in different approaches. The information about the freeze-out surface in terms of freeze-out volume, temperature, chemical potential and radial flow velocity for different particle species are obtained. Further, these parameters are studied as a function of the mass of the secondary particles. A mass-dependent differential freeze-out is observed which does not seem to distinguish between particles and their antiparticles. Further a mass-hierarchy in the radial flow is observed, meaning heavier particles suffer lower radial flow. Tsallis distribution function at finite chemical potential is used to study the mass dependence of chemical potential. The peripheral heavy-ion and proton-proton collisions at the same energies seem to be equivalent in terms of the extracted thermodynamic parameters.

    hep-phnucl-exnucl-thAdv.High Energy Phys.(2016)·75 citations
17. 17*

    Dynamical seesaw mechanism for Dirac neutrinos

    José W.F. Valle🇪🇸 · C.A. Vaquera-Araujo🇪🇸

    So far we have not been able to establish that, as theoretically expected, neutrinos are their own anti-particles. Here we propose a dynamical way to account for the Dirac nature of neutrinos and the smallness of their mass in terms of a new variant of the seesaw paradigm in which the energy scale of neutrino mass generation could be accessible to the current LHC experiments.

    hep-phPLB(2016)·65 citations
18. 18*

    Geometric phase for neutrino propagation in magnetic field

    Sandeep Joshi🇮🇳 · Sudhir R. Jain🇮🇳

    The geometric phase for neutrinos propagating in an adiabatically varying magnetic field in matter is calculated. It is shown that for neutrino propagation in sufficiently large magnetic field the neutrino eigenstates develop a significant geometric phase. The geometric phase varies from 2$\pi$ for magnetic fields $\sim$ fraction of a micro gauss to $\pi$ for fields $\sim 10^7$ gauss or more. The variation of geometric phase with magnetic field parameters is shown and its phenomenological implications are discussed.

    hep-phhep-thPLB(2016)·18 citations
19. 19*

    Active Dirac Neutrinos via $SU(2{)}_L$ Doublets in 5d

    Yukihiro Fujimoto🇯🇵 · K. Hasegawa🇯🇵 · Tomoaki Nagasawa🇯🇵 · Kenji Nishiwaki🇰🇷 · Makoto Sakamoto🇯🇵 · Kentaro Tatsumi🇯🇵

    We propose a new mechanism to generate minuscule active neutrino masses in a five-dimensional~(5d) spacetime of an interval without introducing $SU(2{)}_L$ singlet neutrinos. Under asymmetric boundary conditions on the two end points, a bulk mass for a 5d fermion allows a Dirac particle with a tiny mass eigenvalue. Implementing this mechanism, which provides us a new tool for building neutrino mass models, to the standard model gauge structure is possible when all the gauge bosons and the Higgs boson are localized on one of the branes.

    hep-phJHEP(2016)·7 citations
20. 20*

    Quark and gluon orbital angular momentum: Where are we?

    Cédric Lorcé (Ecole polytechnique, CPHT)🇫🇷 · K.F. Liu (U. Kentucky, Lexington)🇺🇸

    The orbital angular momentum of quarks and gluons contributes significantly to the proton spin budget and attracted a lot of attention in the recent years, both theoretically and experimentally. We summarize the various definitions of parton orbital angular momentum together with their relations with parton distributions functions. In particular, we highlight current theoretical puzzles and give some prospects.

    hep-phFew Body Syst.(2016)·2 citations
21. 21*

    Existence of the critical endpoint in the vector meson extended linear sigma model

    Peter Kovács🇭🇺 · Zsolt Szép🇭🇺 · György Wolf🇭🇺

    The chiral phase transition of the strongly interacting matter is investigated at nonzero temperature and baryon chemical potential mu_B within an extended (2+1) flavor Polyakov constituent quark-meson model which incorporates the effect of the vector and axial vector mesons. The effect of the fermionic vacuum and thermal fluctuations computed from the grand potential of the model is taken into account in the curvature masses of the scalar and pseudoscalar mesons. The parameters of the model are determined by comparing masses and tree-level decay widths with experimental values in a chi^2-minimization procedure which selects between various possible assignments of scalar nonet states to physical particles. We examine the restoration of the chiral symmetry by monitoring the temperature evolution of condensates and the chiral partners' masses and of the mixing angles for the pseudoscalar eta-eta' and the corresponding scalar complex. We calculate the pressure and various thermodynamical observables derived from it and compare them to the continuum extrapolated lattice results of the Wuppertal-Budapest collaboration. We study the T-mu_B phase diagram of the model and find that a critical end point exists for parameters of the model, which give acceptable values of chi^2.

    hep-phnucl-thPRD(2016)·110 citations
22. 22*

    Glueballs and vector mesons at NICA

    Denis Parganlija🇦🇹

    Two interconnected fields of interest are suggested for NICA. Firstly, existence of glueballs is predicted by the theory of strong interaction but -- even after decades of research -- glueball identification in the physical spectrum is still unclear. NICA can help to ascertain experimental glueball candidates via J/Psi decays whose yield is expected to be large. Importance of glueballs is not limited to vacuum: since they couple to other meson states, glueballs can also be expected to influence signatures of chiral-symmetry restoration in the high-energy phase of strong dynamics. Mass shifting or in-medium broadening of vector and axial-vector mesons may occur there but the extent of such phenomena is still uncertain. Additionally, glueball properties could also be modified in medium. Exploration of these issues is the second suggested field of interest that can be pursued at NICA.

    hep-phEPJA(2016)·7 citations
23. 23*

    Symmetries and composite dynamics for the 750 GeV diphoton excess

    Diogo Buarque Franzosi🇩🇪 · Mads T. Frandsen🇩🇰

    The ATLAS and CMS experiments at LHC observe small excesses of diphoton events with invariant mass around 750 GeV. Here we study the possibility of nearly parity degenerate and vector-scalar degenerate spectra as well as composite dynamics in 2 scenarios for explaining the excess: Production of a pseudo-scalar via gluon or photon fusion or via decay of a parent particle together with soft additional final states. We discuss possible underlying realizations of the scenarios motivated by dynamical models of electroweak symmetry breaking (without new coloured states) and fermion masses.

    hep-ph38 citations
24. 24*

    Numerical values of $f^F$, $f^D$, $f^S$ coupling constants in $SU(3)$ invariant interaction Lagrangian of vector-meson nonet with $1/2^{+}$ octet baryons

    C. Adamuscin · E. Bartos · S. Dubnicka · A.Z. Dubnickova

    It is demonstrated how an utilization of all existing experimental information on electric and magnetic nucleon form factors, to be described by the Unitary and Analytic (U\&A) nucleon electromagnetic structure model in space-like and time-like regions simultaneously, can provide numerical values of $f^F$, $f^D$, $f^S$ coupling constants in $SU(3)$ invariant interaction Lagrangian of the vector-meson nonet with $1/2^{+}$ octet baryons. The latter, together with universal vector-meson coupling constants $f_V$, play an essential role in a prediction of $1/2^{+}$ octet hyperon electromagnetic form factors behaviors.

    hep-ph
25. 25*

    Higgs-Higgs Interaction. The One-Loop Amplitude in the Standard Model

    Valeriy V. Dvoeglazov🇲🇽

    The amplitude of Higgs-Higgs interaction is calculated in the Standard Model in the framework of the Sirlin's renormalization scheme in the unitary gauge. The one-loop corrections for lambda, the constant of 4-chi interaction are compared with the previous results of L. Durand et al. obtained on using the technique of the equivalence theorem, and in the different gauges.

    hep-phhep-thHadronic J.(2016)·0 citations
26. 26*

    Cross Section and Higgs Mass Measurement with Higgsstrahlung at the CEPC

    Zhenxing Chen🇨🇳 · Ying Yang🇨🇳 · Manqi Ruan🇨🇳 · Dayong Wang🇨🇳 · Gang Li🇨🇳 · Shan Jin🇨🇳 · Yong Ban🇨🇳

    The Circular Electron Positron Collider (CEPC) is a future Higgs factory proposed by the Chinese high energy physics community. It will operate at a center-of-mass energy of 240-250 GeV. The CEPC will accumulate an integrated luminosity of 5 ab${}^{-1}$ in ten years' operation, producing one million Higgs bosons via the Higgsstrahlung and vector boson fusion processes. This sample allows a percent or even sub-percent level determination of the Higgs boson couplings. With GEANT4-based full simulation and dedicated fast simulation tool, we evaluated the statistical precisions of the Higgstrahlung cross section ${\sigma }_{ZH}$ and the Higgs mass $m_H$ measurement at the CEPC in the $Z\to {\mu }^{+}{\mu }^{-}$ channel. The statistical precision of ${\sigma }_{ZH}$ ($m_H$) measurement could reach 0.97\% (6.9 MeV) in the model-independent analysis which uses only the information of Z boson decay. For the standard model Higgs boson, the $m_H$ precision could be improved to 5.4 MeV by including the information of Higgs decays. Impact of the TPC size to these measurements is investigated. In addition, we studied the prospect of measuring the Higgs boson decaying into invisible final states at the CEPC. With the standard model $ZH$ production rate, the upper limit of $\mathcal{B}(H\to inv.)$ could reach 1.2\% at 95\% confidence level.

    ↳ hep-exhep-phCPC(2017)·37 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.