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XXXIII International (ONLINE) Workshop on High Energy Physics "Hard Problems of Hadron Physics: Non-Perturbative QCD & Related Quests"

8–12 нояб. 2021 г.
Europe/Moscow timezone

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Morning session 3

3
9 нояб. 2021 г., 10:00

Conveners

Morning session 3: New Results in Hadron Spectroscopy (heavy quarks)

  • Alexander Berezhnoy (SINP MSU)

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  1. 6. Double-J/psi system in the spotlight of recent LHCb data
    Dr Alexey Nefediev (Lebedev Physical Institute of RAS)
    09.11.2021, 10:00
    New Results in Hadron Spectroscopy

    Recently the LHCb Collaboration announced intriguing results on the double-J/psi production in proton-proton collisions. A coupled-channel interpretation of the measured di-J/psi spectrum is presented and a possible nature of the near-threshold state X(6200) is discussed.

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  2. 50. Inclusive Decays of Heavy Quark Hybrids
    Abhishek Mohapatra (TUM)
    09.11.2021, 10:30
    New Results in Hadron Spectroscopy

    In order to understand the nature of the XYZ particles, theoretical predictions of the various XYZ decay modes are essential. In this work, we focus on the semi-inclusive decay of heavy quarkonium hybrids into traditional quarkonium in the Born Oppenheimer EFT (BOEFT) framework. We present results of the decay rates for several heavy quark hybrids. We also develop a systematic framework in...

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  3. 5. SU(3) hybrid static potentials at small quark-antiquark separations from fine lattices
    Marc Wagner (Goethe University Frankfurt)
    09.11.2021, 11:00
    New Results in Hadron Spectroscopy

    I discuss recent progress concerning the computation of the $\Pi_u$ and $\Sigma_u^-$ hybrid static potentials at small quark-antiquark separations. Such potentials are important for investigating masses and properties of heavy hybrid mesons in the Born-Oppenheimer approximation.

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  4. 42. Spectroscopy of exotic mesons from lattice simulations
    Sasa Prelovsek
    09.11.2021, 11:30
    New Results in Hadron Spectroscopy

    Recent lattice QCD studies of charmonium-like and bottomonium-like states will be presented. The masses and widths of charmonium-like states with isospin zero are extracted by considering the scattering on the lattice. We find conventional charmonia with J=0,1,2,3 in line with experiment and two exotic candidates just below D barD and Ds barDs thresholds. The bottomonium-like system with...

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  5. 57. Production of D-wave states of bc quarkonium at the LHC
    Ilia Belov (SINP MSU)
    09.11.2021, 12:15
    New Results in Hadron Spectroscopy

    We study the hadronic production of $D$-wave states of $\bar b c$ quarkonium. The relative yield of such states is estimated for kinematic conditions of LHC experiments. The direct $B_c(D)$ production is complemented by NRQCD contributions being the same order $O(v^4)$. The NRQCD matrix elements are estimated within naive velocity scaling rule.

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  6. 71. Heavy exotic mesons at LHCb
    Vitaly Vorobyev (BINP)
    09.11.2021, 12:45
    New Results in Hadron Spectroscopy

    Recent results on heavy exotic hadrons obtained by the LHCb experiment are discussed:

    • Tetraquarks with hidden charm (X(3872), T_{cccc}(6900), Z_{cs}(4xxx)+, X(46xx))
    • Pentaquarks with hidden charm (P_c(4xxx)+, P_{cs}(4459)0)
    • Doubly charmed tetraquark (T_{cc}+)

    Most of the results are based on an analysis of the full runs I and II LHCb dataset.

    This talk is dedicated to...

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  7. 58. Discussion 3
    Antonio Vairo (Physik-Dep., Technische Univ. München)
    09.11.2021, 13:15
    New Results in Hadron Spectroscopy
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