Tue·Feb 14, 2017Tuesday·February 14, 2017

1. 01*

   Is there new particle running in the loop-induced $H\gamma \gamma$ and $Hgg$ vertex?

   Seungwon Baek🇰🇷 · Xing-Bo Yuan🇹🇼

   Loop-induced $Hgg$ and $H\gamma \gamma$ coupling play an important role in the Higgs production and decay at the LHC. These vertices can be affected by various New Physics contributions, including new particles, anomalous Yukawa couplings, and so on. We point out some ratios of the Higgs signal strengths could help disentangle the contributions of new particles from other sources of New Physics.

   hep-phhep-exPLB(2017)·2 citations
2. 02*

   An Effective Two-Flavor Approximation for Neutrino Survival Probabilities in Matter

   Hisakazu Minakata🇪🇨

   It is known in vacuum that the three-flavor neutrino survival probability can be approximated by the effective two-flavor form to first orders in $ϵ\equiv \Delta m_{21}^2/\Delta m_{31}^2$, with introduction of the effective $\Delta m_{\alpha \alpha }^2$ ($\alpha =e,\mu ,\tau$), in regions of neutrino energy $E$ and baseline $L$ such that $\Delta m_{31}^{2}L/2E\sim \pi$. Here, we investigate the question of whether the similar effective two-flavor approximation can be formulated for the survival probability in matter. Using a perturbative framework with the expansion parameters $ϵ$ and $s_{13}\propto \sqrt{ϵ}$, we give an affirmative answer to this question and the resultant two-flavor form of the probability is valid to order $ϵ$. However, we observe a contrived feature of the effective $\Delta m_{\alpha \alpha }^2(a)$ in matter. It ceases to be a combination of the fundamental parameters and has energy dependence, which may be legitimate because it comes from the matter potential. But, it turned out that $\Delta m_{\mu \mu }^2(a)$ becomes $L$-dependent, though $\Delta m_{ee}^2(a)$ is not, which casts doubt on adequacy of the concept of effective $\Delta m^2$ in matter. We also find that the appearance probability in vacuum admits, to order $ϵ$, the similar effective two-flavor form with a slightly different effective $\Delta m_{\beta \alpha }^2$ from the disappearance channel. A general result is derived to describe suppression of the matter effect in the oscillation probability.

   hep-phJHEP(2017)·7 citations
3. 03*

   Discriminating leptonic Yukawa interactions with doubly charged scalar at the ILC

   Takaaki Nomura🇰🇷 · Hiroshi Okada🇹🇼 · Hiroshi Yokoya🇰🇷

   We explore discrimination of two types of leptonic Yukawa interactions associated with Higgs triplet, ${\bar{L}}_L^c\Delta L_L$, and with $SU(2)$ singlet doubly charged scalar, ${\bar{e}}_R^c{k}^{++}{e}_R$. These interactions can be distinguished by measuring the effects of doubly charged scalar boson exchange in the $e^{+}{e}^{-}\to {\ell }^{+}el{l}^{-}$ processes at polarized electron-positron colliders. We study a forward-backward asymmetry of scattering angular distribution to estimate the sensitivity for these effects at the ILC. In addition, we investigate prospects of upper bounds on the Yukawa couplings by combining the constraints of lepton flavor violation processes and the $e^{+}{e}^{-}\to {\ell }^{+}{\ell }^{-}$ processes at the LEP and the ILC.

   hep-phNPB(2018)·37 citations
4. 04*

   Why PeV scale left-right symmetry is a good thing

   Urjit A. Yajnik🇮🇳

   Left-right symmetric gauge theory presents a minimal paradigm to accommodate massive neutrinos with all known conserved symmetries duly gauged. The work presented here is based on the argument that the see-saw mechanism does not force the new right handed symmetry scale to be very high, and as such some of the species from the spectrum of the new gauge and Higgs bosons can have masses within a few orders of magnitude of the TeV scale. The scale of the left-right parity breaking in turn can be sequestered from the Planck scale by supersymmetry. We have studied several formulations of such Just Beyond Standard Model (JBSM) theories for their consistency with cosmology. Specifically the need to eliminate phenomenologically undesirable domain walls gives many useful clues. The possibility that the exact left-right symmetry breaks in conjunction with supersymmetry has been explored in the context of gauge mediation, placing restrictions on the available parameter space. Finally we have also studied a left-right symmetric model in the context of metastable supersymmetric vacua and obtained constraints on the mass scale of Right handed symmetry. In all the cases studied, The mass scale of right handed neutrino $M_R$ remains bounded from above, and in some of the cases the scale $10^9$ GeV favourable for supersymmetric thermal leptogenesis is disallowed. On the other hand PeV scale remains a viable option, and the results warrant a more detailed study of such models for their observability in collider and astroparticle experiments.

   hep-phPramana(2017)·1 citation
5. 05*

   Measuring CP nature of top-Higgs couplings at the future Large Hadron electron collider

   Baradhwaj Coleppa🇮🇳 · Mukesh Kumar🇿🇦 · Satendra Kumar🇮🇳 · Bruce Mellado🇿🇦

   We investigate the sensitivity of top-Higgs coupling by considering the associated vertex as CP phase (${\zeta }_t$) dependent through the process $p{e}^{-}\to \bar{t}h{\nu }_e$ in the future Large Hadron electron collider. In particular the decay modes are taken to be $h\to b\bar{b}$ and $\bar{t}\to$ leptonic mode. Several distinct ${\zeta }_t$ dependent features are demonstrated by considering observables like cross sections, top-quark polarisation, rapidity difference between $h$ and $\bar{t}$ and different angular asymmetries. Luminosity ($L$) dependent exclusion limits are obtained for ${\zeta }_t$ by considering significance based on fiducial cross sections at different $\sigma$-levels. For electron and proton beam-energies of 60 GeV and 7 TeV respectively, at $L=100$~fb${}^{-1}$, the regions above $\pi /5<{\zeta }_t\le \pi$ are excluded at 2$\sigma$ confidence level, which reflects better sensitivity expected at the Large Hadron Collider. With appropriate error fitting methodology we find that the accuracy of SM top-Higgs coupling could be measured to be $\kappa =1.00\pm 0.17(0.08)$ at $\sqrt{s}=1.3(1.8)$ TeV for an ultimate $L=1{\mathrm{ab}}^{-1}$.

   hep-phPLB(2017)·27 citations
6. 06*

   Deep inelastic scattering as a probe of entanglement

   Dmitri E. Kharzeev🇺🇸 · Eugene M. Levin🇨🇱

   Using non-linear evolution equations of QCD, we compute the von Neumann entropy of the system of partons resolved by deep inelastic scattering at a given Bjorken $x$ and momentum transfer $q^2=-Q^2$. We interpret the result as the entropy of entanglement between the spatial region probed by deep inelastic scattering and the rest of the proton. At small $x$ the relation between the entanglement entropy $S(x)$ and the parton distribution $xG(x)$ becomes very simple: $S(x)=\ln [xG(x)]$. In this small $x$, large rapidity $Y$ regime, all partonic micro-states have equal probabilities -- the proton is composed by an exponentially large number $\exp (\Delta Y)$ of micro-states that occur with equal and exponentially small probabilities $\exp (-\Delta Y)$, where $\Delta$ is defined by $xG(x)\sim 1/x^{\Delta }$. For this equipartitioned state, the entanglement entropy is maximal -- so at small $x$, deep inelastic scattering probes a {\it maximally entangled state}. We propose the entanglement entropy as an observable that can be studied in deep inelastic scattering. This will require event-by-event measurements of hadronic final states, and would allow to study the transformation of entanglement entropy into the Boltzmann one. We estimate that the proton is represented by the maximally entangled state at $x\le 10^{-3}$; this kinematic region will be amenable to studies at the Electron Ion Collider.

   hep-phhep-exhep-thnucl-exPRD(2017)·270 citations
7. 07*

   The $1/N_c$ expansion in hadron effective field theory

   Guo-Ying Chen🇨🇳

   We study the $N_c$ scalings of pion-nucleon and nucleon-nucleon scatterings and find that a consistent large $N_c$ counting can be established if we assume Witten's counting rules are applied to matrix elements or scattering amplitudes which use the relativistic normalization for the nucleons. With the pionless effective field theory, we also find that the $S$-wave nucleon-nucleon interaction is so strong that it should be treated nonperturbatively at the leading order in the $1/N_c$ expansion. By summing all the leading order diagrams, we find that the deuteron binding energy is of order $1/N_c$. In contrast, meson-meson interaction is so weak that loosely-bound meson-meson molecular states may not exist in the large $N_c$ limit.

   hep-phnucl-thCommun.Theor.Phys.(2018)·4 citations
8. 08*

   Spatially modulated chiral condensates

   Stefano Carignano🇮🇹

   I discuss some properties of spatially dependent chiral condensates, focusing on one-dimensional modulations. After briefly introducing a generic formalism for studying inhomogeneous solutions in dense quark matter, I consider a plane-wave and a sinusoidal ansatz, and discuss the relationship between their order parameters and free energies, as well as a comparison of their dispersion relations. I then introduce a real kink crystal, and discuss its relationship with the sinusoidal ansatz by performing a Fourier analysis of this kind of solution.

   hep-phJ.Phys.Conf.Ser.(2018)·2 citations
9. 09*

   New Physics in multi-Higgs boson final states

   Wolfgang Kilian🇩🇪 · Sichun Sun🇨🇳 · Qi-Shu Yan🇨🇳 · Xiaoran Zhao🇧🇪 · Zhijie Zhao🇩🇪

   We explore the potential for the discovery of the triple-Higgs signal in the $2b2l^{\pm }4j+E/$ decay channel at a $100$ TeV hadron collider. We consider both the Standard Model and generic new-physics contributions, described by an effective Lagrangian that includes higher-dimensional operators. The selected subset of operators is motivated by composite-Higgs and Higgs-inflation models. In the Standard Model, we perform both a parton-level and a detector-level analysis. Although the parton-level results are encouraging, the detector-level results demonstrate that this mode will be really challenging. However, sizable contributions from new effective operators can largely increase the cross section and/or modify the kinematics of the Higgs bosons in the final state. Taking into account the projected constraints from single and double Higgs-boson production, we propose benchmark points in the new physics models for the measurement of the triple-Higgs boson final state for future collider projects.

   hep-phJHEP(2017)·38 citations
10. 10*

    Boer-Mulders function of pion meson and $q_T$-weighted $\cos 2\varphi$ asymmetry in the unpolarized ${\pi }^{-}p$ Drell-Yan at COMPASS

    Zhengxian Wang🇨🇳 · Xiaoyu Wang🇨🇳 · Zhun Lu🇨🇳

    We calculate the two leading-twist transverse momentum dependent distribution functions of the pion meson, the unpolarized distribution $f_{1\pi }(x,{\mathbf{k}}_T^2)$ and the Boer-Mulders function $h_{1\pi }^{\perp }(x,{\mathbf{k}}_T^2)$, using the pion wave functions derived from a light-cone approach. The evolution effect of the first ${\mathbf{k}}_T$-moment of the pion Boer-Mulders function is studied by employing an approximate evolution kernel. Using the model resulting distributions, we predict the transverse momentum weighted $\cos 2\varphi$ azimuthal asymmetry in the unpolarized ${\pi }^{-}p$ Drell-Yan process which can be measured at COMPASS in the near future.

    hep-phhep-exPRD(2017)·25 citations
11. 11*

    On the solution of linearized (linear in S-matrix) Balitsky-Kovchegov equation

    Raktim Abir🇮🇳 · Mariyah Siddiqah🇮🇳

    We revisited solution of a linearized form of leading order Balitsky-Kovchegov equation (linear in S-matrix for dipole-nucleus scattering). Here we adopted dipole transverse width dependent cutoff in order to regulate the dipole integral. We also have taken care of all the higher order terms (higher order in the cutoff) that have been reasonably neglected before. The solution reproduces both McLerran-Venugopalan type initial condition (Gaussian in scaling variable) and Levin-Tuchin solution (Gaussian in logarithm of scaling variable) in the appropriate limits. It also connects this two opposite limits smoothly with better accuracy for sets of rescaled rapidity when compared to numerical solutions of full leading order Balitsky-Kovchegov equation.

    hep-phhep-thnucl-thPRD(2017)·9 citations
12. 12*

    Resonant Generation of an Electron-Positron Pair by Two Photons to Excited Landau Levels

    M. M. Diachenko🇺🇦 · O. P. Novak🇺🇦 · R. I. Kholodov🇺🇦

    We consider the resonant generation of an electron-positron pair by two polarized photons to arbitrarily low Landau levels. The resonance occurs when the energy of one photon exceeds the one-photon generation threshold, and the energy of the other photon is multiple to the spacing between the levels. The cross section of the process is determined taking into account the spins of particles. The order of magnitude of the cross section is the highest when the magnetic moments of the particles are oriented along the magnetic field.

    hep-phJ.Exp.Theor.Phys.(2015)·4 citations
13. 13*

    Pair production by an electron to excited levels in a magnetic field

    O. Novak🇺🇦

    The resonant process of electron-positron pairproduction by an electron in a subcritical magnetic field has been studied when the pair is produced to exited Landau levels. The spin dependency of the process rate has been analyzed. In the spin state with the greatest rate the virtual photon is emitted with a flip of electron spin. This behavior is not suppressed for radiative transitions from a relativistic initial state to low energy levels.

    hep-phPhys.Scripta(2015)·1 citation
14. 14*

    A cascade of $e^{-}{e}^{+}$ pair production by a photon with subsequent annihilation to a single photon in a strong magnetic field

    M. M. Diachenko🇺🇦 · O. P. Novak🇺🇦 · R. I. Kholodov🇺🇦

    The process of electron-positron pair production by a photon with subsequent annihilation to a single photon in a strong magnetic field has been studied. The general amplitude has been calculated and the process rate have been found in the low Landau levels approximation (resonant and nonresonant cases). The comparison of resonant and nonresonant cases shows a significant excess of the resonant rate. The polarization of the final photon in a strong magnetic field has also been found. It has been shown that polarizations of the initial and the final photons are independent except for the case of normal linear polarization of the initial photon.

    hep-phLaser Phys.·4 citations
15. 15*

    Pair production in a magnetic and radiation field in a pulsar magnetosphere

    M. M. Diachenko🇺🇦 · O. P. Novak🇺🇦 · R. I. Kholodov🇺🇦

    In the present work one- and two-photon pair production in a subcritical magnetic field have been considered. Two-photon production has been studied in the resonant case, when the cross section considerably increases compared to the nonresonant case. While one-photon pair production is considered to be the main mechanism of plasma generation in a pulsar magnetosphere, we suggest the existence of another one, which is resonant two-photon production process.

    hep-phastro-ph.HEMod.Phys.Lett.A(2015)·5 citations
16. 16*

    Improved sensitivity on the electromagnetic dipole moments of the top quark in $\gamma \gamma$, $\gamma {\gamma }^{\ast }$ and ${\gamma }^{\ast }{\gamma }^{\ast }$ collisions at the CLIC

    A. A. Billur🇹🇷 · M. Köksal🇹🇷 · A. Gutiérrez-Rodríguez🇲🇽

    We realize a phenomenological study to examine the sensitivity on the magnetic moment and electric dipole moment of the top quark through the processes $\gamma \gamma \to t\bar{t}$, $e\gamma \to e{\gamma }^{\ast }\gamma \to et\bar{t}$ and $e^{-}{e}^{+}\to e^{-}{\gamma }^{\ast }{\gamma }^{\ast }{e}^{+}\to e^{-}t\bar{t}{e}^{+}$ at the CLIC. We find that with a center-of-mass energy of the CLIC-1.4$TeV$, integrated luminosity of $\mathcal{L}=1500f{b}^{-1}$ and CLIC-3$TeV$, integrated luminosity of $\mathcal{L}=2000f{b}^{-1}$ with systematic uncertainties of ${\delta }_{sys}=0,5,10\%$ at the $95\%C.L.$, it is possible the CLIC may put limits on the electromagnetic dipole moments of the top quark ${\hat{a}}_V$ and ${\hat{a}}_A$ with a sensitivity of $\mathcal{O}(10^{-3}-10^{-2})$. Therefore, we show that the sensitivity with the CLIC data is much greater than that for the LHC data.

    hep-phPRD(2017)·25 citations
17. 17*

    Radiatively Induced Neutrino Mass Model with Flavor Dependent Gauge Symmetry

    SangJong Lee🇰🇷 · Takaaki Nomura🇰🇷 · Hiroshi Okada🇹🇼

    We study a radiative seesaw model at one-loop level with a flavor dependent gauge symmetry $U(1{)}_{\mu -\tau }$, in which we consider bosonic dark matter. We also analyze the constraints from lepton flavor violations, muon $g-2$, relic density of dark matter, and collider physics, and carry out numerical analysis to search for allowed parameter region which satisfy all the constraints and to investigate some predictions. Furthermore we find that a simple but adhoc hypothesis induces specific two zero texture with inverse mass matrix, which provides us several predictions such as a specific pattern of Dirac CP phase.

    hep-phNPB(2018)·38 citations
18. 18*

    Towards tests of quark-hadron duality with functional analysis and spectral function data

    Diogo Boito🇧🇷 · Irinel Caprini🇷🇴

    The presence of terms that violate quark-hadron duality in the expansion of QCD Green's functions is a generally accepted fact. Recently, a new approach was proposed for the study of duality violations (DVs), which exploits the existence of a rigorous lower bound on the functional distance, measured in a certain norm, between a "true" correlator and its approximant calculated theoretically along a contour in the complex energy plane. In the present paper we pursue the investigation of functional-analysis based tests towards their application to real spectral function data. We derive a closed analytic expression for the minimal functional distance based on the general weighted $L^2$ norm and discuss its relation with the distance measured in $L^{\infty }$ norm. Using fake data sets obtained from a realistic toy model in which we allow for covariances inspired from the publicly available ALEPH spectral functions, we obtain by Monte Carlo simulations the statistical distribution of the strength parameter that measures the magnitude of the DV term added to the usual operator product expansion (OPE). The results show that, if the region with large errors near the end-point of the spectrum in $\tau$ decays is excluded, the functional-analysis based tests using either $L^2$ or $L^{\infty }$ norms are able to detect, in a statistically significant way, the presence of DVs in realistic spectral function pseudodata.

    hep-phPRD(2017)·3 citations
19. 19*

    Building and testing models with extended Higgs sectors

    Igor P. Ivanov🇵🇹

    Models with non-minimal Higgs sectors represent a mainstream direction in theoretical exploration of physics opportunities beyond the Standard Model. Extended scalar sectors help alleviate difficulties of the Standard Model and lead to a rich spectrum of characteristic collider signatures and astroparticle consequences. In this review, we introduce the reader to the world of extended Higgs sectors. Not pretending to exhaustively cover the entire body of literature, we walk through a selection of the most popular examples: the two- and multi-Higgs-doublet models, as well as singlet and triplet extensions. We will show how one typically builds models with extended Higgs sectors, describe the main goals and the challenges which arise on the way, and mention some methods to overcome them. We will also describe how such models can be tested, what are the key observables one focuses on, and illustrate the general strategy with a subjective selection of results.

    hep-phhep-exPPNP(2017)·212 citations
20. 20*

    All about $H^{\pm \pm }$ in Higgs Triplet Model

    Ambalika Biswas🇮🇳

    In this piece of work, the nonstandard Higgs boson masses have been constrained by restrictions arising from Higgs diphoton decay width, stability, perturbativity, unitarity and electroweak T-parameter in the framework of the Higgs triplet model. As a matter of fact the loop induced Higgs decays will now obtain additional contributions from singly and doubly charged Higgs bosons. In simulations of pair production of $H^{++}$ it is assumed that the production channel $q\overline{q}\to {\gamma }^{\ast },Z^{\ast }\to H^{++}{H}^{--}$ is the only mechanism. Whereas there may be other channels of production of doubly charged Higgs bosons as for instance from the decay of singly charged Higgs bosons. The effect of this additional sources of production of the contributing non-standard charged particles to the loop induced Higgs decays has been studied in this paper.

    hep-ph5 citations
21. 21*

    Heavy Quarkonium Hybrids: Spectrum, Decay and Mixing

    Rubén Oncala🇳🇱 · Joan Soto🇪🇸

    We present a largely model independent analysis of the lighter Heavy Quarkonium Hybrids based on the strong coupling regime of Potential Non-Relativistic QCD (pNRQCD). We calculate the spectrum at leading order, including the mixing of static hybrid states. We use potentials that fulfill the required short and long distance theoretical constraints and fit well the available lattice data. We argue that the decay width to the lower lying Heavy Quarkonia can be reliably estimated in some cases, and provide results for a selected set of decays. We also consider the mixing with Heavy Quarkonium states. We establish the form of the mixing potential at $O(1/m_Q)$, $m_Q$ being the mass of the heavy quarks, and work out its short and long distance constraints. The weak coupling regime of pNRQCD and the effective string theory of QCD are used for that goal. We show that the mixing effects may indeed be important and produce large spin symmetry violations. Most of the isospin zero XYZ states fit well in our spectrum, either as a Hybrid or standard Quarkonium candidates.

    hep-phhep-exhep-latPRD(2017)·111 citations
22. 22*

    Axion production from primordial magnetic fields

    Kohei Kamada🇺🇸 · Yuichiro Nakai🇺🇸

    Production of axionlike particles (ALPs) by primordial magnetic fields may have significant impacts on cosmology. We discuss the production of ALPs in the presence of the primordial magnetic fields. We find a region of the ALP mass and photon coupling which realizes the observed properties of the dark matter with appropriate initial conditions for the magnetic fields. This region may be interesting in light of recent indications for the 3.5 keV lines from galaxy clusters. For a small axion mass, a region of previously allowed parameter spaces is excluded by overproduction of ALPs as a hot/warm dark matter component. Since the abundance of ALPs strongly depends on the initial conditions of primordial magnetic fields, our results provide implications for scenarios of magnetogenesis.

    hep-phastro-ph.COPRD(2017)·8 citations
23. 23*

    Elliptic flow from color-dipole orientation in pp and pA collisions

    Edmond Iancu🇫🇷 · Amir H. Rezaeian🇨🇱

    For ultrarelativistic proton-proton and proton-nucleus collisions, we perform an exploratory study of the contribution to the elliptic flow $v_2$ coming from the orientation of the momentum of the produced particles with respect to the reaction plane. Via the CGC factorization valid at high energies, this contribution is related to the orientation of a color dipole with respect to its impact parameter, which in turn probes the transverse inhomogeneity in the target. Using the McLerran-Venugopalan model (with impact-parameter dependence) as an effective description for the soft gluon distribution in the (proton or nuclear) target, we present a semi-analytic calculation of the dipole scattering amplitude, including its angular dependence. We find that the angular dependence is controlled by soft gluon exchanges and hence is genuinely non-perturbative. The effects of multiple scattering turn out to be essential (in particular, they change the sign of $v_2$). We find that sizable values for $v_2$, comparable to those observed in the LHC data and having a similar dependence upon the transverse momenta of the produced particles, can be easily generated via peripheral collisions. In particular, $v_2$ develops a peak at a transverse momentum which scales with the saturation momentum in the target.

    hep-phhep-exnucl-thPRD(2017)·63 citations
24. 24*

    Twisted finite-volume corrections to $K_{l3}$ decays with partially-quenched and rooted-staggered quarks

    Claude Bernard🇺🇸 · Johan Bijnens🇸🇪 · Elvira Gámiz🇪🇸 · Johan Relefors🇸🇪

    The determination of $|V_{us}|$ from kaon semileptonic decays requires the value of the form factor $f_{+}(q^2=0)$ which can be calculated precisely on the lattice. We provide the one-loop partially quenched chiral perturbation theory expressions both with and without including the effects of staggered quarks for all form factors at finite volume and with partially twisted boundary conditions for both the vector current and scalar density matrix elements at all $q^2$. We point out that at finite volume there are more form factors than just $f_{+}$ and $f_{-}$ for the vector current matrix element but that the Ward identity is fully satisfied. The size of the finite-volume corrections at present lattice sizes is small. This will help improve the lattice determination of $f_{+}(q^2=0)$ since the finite-volume error is the dominant error source for some calculations. The size of the finite-volume corrections may be estimated on a single lattice ensemble by comparing results for various twist choices.

    ↳ hep-lathep-phJHEP(2017)·9 citations
25. 25*

    Pure gauge QCD flux tubes and their widths at finite temperature

    P. Bicudo🇵🇹 · N. Cardoso🇵🇹 · M. Cardoso🇵🇹

    We study the flux tubes produced by static quark-antiquark, quark-quark and quark-gluon charges at finite temperature in pure gauge SU(3) lattice QCD. Our sources are static and our lattice correlators are composed of fundamental and adjoint Polyakov loops. To signal the flux tubes, we compute the square densities of the chromomagnetic and chromoelectric fields with plaquettes, in a gauge invariant framework. We study the existence and non-existence of flux tubes both above and below the deconfinement phase transition temperature Tc. Using the Lagrangian density as a probability distribution, we also compute the widths of the flux tubes and study their widening as a function of the intercharge distance. We determine our results with both statistical and systematic errors. Our computations are performed in NVIDIA GPUs using the CUDA language.

    ↳ hep-lathep-phNPB(2019)·24 citations
26. 26*

    Decay width of $d^{\ast }(2380)\to NN\pi$ process in a chiral constituent quark model

    Yubing Dong🇨🇳 · Fei Huang🇨🇳 · Pengnian Shen🇨🇳 · Zongye Zhang🇨🇳

    The width of three-body single-pion decay process $d^{\ast }\to NN{\pi }^{0,\pm }$ is calculated by using the $d^{\ast }$ wave function obtained from our chiral SU(3) constituent quark model calculation. The effect of the dynamical structure on the width of $d^{\ast }$ is taken into account in both the single $\Delta \Delta$ channel and coupled $\Delta \Delta +CC$ two-channel approximations. Our numerical result shows that in the coupled-channel approximation, namely, the hidden-color configuration being considered, the obtained partial decay width of $d^{\ast }\to NN\pi$ is about several hundred $\mathrm{KeV}$, while in the single $\Delta \Delta$ channel it is just about $2\sim 3\mathrm{MeV}$. We, therefore, conclude that the partial width in the single-pion decay process of $d^{\ast }$ is much smaller than the widths in its double-pion decay processes. Our prediction may provide a criterion for judging different interpretations of the $d^{\ast }$ structure, as different pictures for the $d^{\ast }$ may result quite different partial decay width.

    ↳ nucl-thhep-phPLB(2017)·33 citations
27. 27*

    Photoproduction of $\gamma N\to K^{+}{\Sigma }^{\ast }(1385)$ in the Reggeized framework

    Byung-Geel Yu🇰🇷 · Kook-Jin Kong🇰🇷

    Photoproduction of $K{\Sigma }^{\ast }(1385)$ on the nucleon is investigated within the Regge framework and the reaction mechanism is analyzed based on the data existing in the channels $\gamma p\to K^{+}{\Sigma }^{\ast 0}$ and $\gamma n\to K^{+}{\Sigma }^{\ast -}$. The Reggeization of the $t$-channel meson exchanges $K(494)+K^{\ast }(892)+K_2^{\ast }(1430)$ is employed to construct the photoproduction amplitude. The Rarita-Schwinger formalism is applied for the spin-3/2${}^{+}$ strangeness-baryon ${\Sigma }^{\ast }$ with a special gauge prescription utilized for the convergence of these reaction processes. Within a set of coupling constants determined from the symmetry arguement for the $K$ and $K^{\ast }$ and from the duality and vector dominance for the $K_2^{\ast }$, the data of the both processes are reproduced to a good degree. The production mechanism of these processes are featured by the dominance of the contact term plus the $K$ exchange with the role of the $K_2^{\ast }$ following rather than the $K^{\ast }$.

    ↳ nucl-thhep-phPRC(2017)·5 citations
28. 28*

    Neutrino oscillation tomography of the Earth with KM3NeT-ORCA

    Simon Bourret🇫🇷 · João A. B. Coelho🇫🇷 · Véronique Van Elewyck (for the KM3NeT collaboration)🇫🇷

    KM3NeT-ORCA is a water-Cherenkov neutrino detector designed for studying the oscillations of atmospheric neutrinos, with the primary objective of measuring the neutrino mass ordering. Atmospheric neutrinos crossing the Earth undergo matter effects, modifying the pattern of their flavour oscillations. The study of the angular and energy distribution of neutrino events in ORCA can therefore provide tomographic information on the Earth's interior with an independent technique, complementary to the standard geophysics methods. Preliminary estimations based on a full Monte Carlo simulation of the detector response show that after ten years of operation the electron density can be measured with a precision of 3-5% in the mantle and 7-10% in the outer core - depending on the mass ordering.

    ↳ physics.ins-dethep-exhep-phphysics.geo-phJ.Phys.Conf.Ser.(2017)·27 citations
29. 29*

    QED Corrections to Hadronic Observables

    Agostino Patella🇨🇭

    When aiming at the percent precision in hadronic quantities calculated by means of lattice simulations, isospin breaking effects become relevant. These are of two kinds: up/down mass splitting and electromagnetic corrections. In order to account properly for the latter, a consistent formulation of electrically-charged states in finite volume is needed. In fact on a periodic torus Gauss law and large gauge transformations forbid the propagation of electrically-charged states. In this talk I will review methods that have been used or proposed so far in order to circumvent this problem, while highlighting practical as well as conceptual pros and cons. I will also review and discuss various methods to calculate electromagnetic corrections to hadron masses and decay rates in numerical simulations.

    ↳ hep-lathep-phPoS(2017)·61 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.