Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session EK: Hadron Spectroscopy with Electron, Photon, and Hadron Beams II |
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Chair: Sanghwa Park, Stony Brook University Room: Hilton Queen's 4 |
Thursday, October 25, 2018 7:00PM - 7:30PM |
EK.00001: Hadron interactions from lattice QCD - application to hadron resonances Invited Speaker: Yoichi Ikeda I will present recent progresses of LQCD on hadronic interactions which play a crucial role to understand hadron resonances and the properties of atomic nuclei. So far, two theoretically equivalent methods, the L\"{u}scher's method and the HAL QCD method, to extract the hadronic interactions were proposed. |
Thursday, October 25, 2018 7:30PM - 7:45PM |
EK.00002: Lambda_c N interaction from lattice QCD and its application to Lambda_c hypernuclei Takaya Miyamoto We study the Lambda_c - nucleon interaction faithful to S-matrix in QCD on the basis of the HAL QCD method. In HAL QCD method, Nambu-Bethe-Salpeter wave functions are calculated on the lattice, and potentials are extracted form them. I will present our results on the 1S0 and 3S1 Lambda_c - nucleon potentials and scattering observables such as phase shifts. The scattering observables show that the Lambda_c - nucleon interaction is attractive and its spin dependence is weak. Using the extracted potentials, we also examine possible Lambda_c nuclei by constructing a single-folding potential, which can be studied at J-PARC and FAIR in the future. |
Thursday, October 25, 2018 7:45PM - 8:00PM |
EK.00003: Charmed baryon spectroscopy using a hadron beam at J-PARC Kotaro Shirotori, Jung-Kun Ahn, Shuhei Ajimura, Takaya Akaishi, Kazuya Aoki, Hidemitsu Asano, Wen-Chen Chang, Ryotaro Honda, Yudai Ichikawa, Takatsugu Ishikawa, Yusuke Komatsu, Yue Ma, Koji Miwa, Yoshiyuki Miyachi, Yuhei Morino, Takashi Nakano, Megumi Naruki, Hiroyuki Noumi, Kyoichiro Ozawa, Fuminori Sakuma, Takahiro Sawada, Yorihito Sugaya, Tomonori Takahashi, Kiyoshi Tanida, Natsuki Tomida One of main subjects in the hadron physics is to understand how hadrons are originated by quarks. Charmed baryon spectroscopy gives us opportunities to understand degree of freedoms to describe the hadron structure. For understanding the charmed baryon structure, it is essential for the diquark correlation which is generated by the isolated two quarks and the charm quark. Properties of the diquark correlation are expected to be emerged as excitation modes in the excited states. We proposed a spectroscopy experiment to measure excited states of charmed baryons at the J-PARC high-momentum beam line. The systematic measurement such as excitation energies, production rates and the decay properties of charmed baryons will be performed by a spectroscopy experiment with a general purpose spectrometry system. In particular, the measurement of hadronic production rates of the π- + p -> Yc*+ + D*- reaction which can excite a particular diquark motion called λ-mode give us information of the collective motion between diquark and charm quark in the excited charmed baryons. From the experimental results of systematic measurements, the diquark correlation which is expectedly an essential degree of freedom to describe the hadron structure can be established. |
Thursday, October 25, 2018 8:00PM - 8:15PM |
EK.00004: Pion induced reactions for charmed baryon productions Sangin Shim, Atsushi Hosaka, Hyun-Chul Kim We discuss production reactions for charmed baryons at hadron facilities such as J-PARC. One and two-quark reaction mechanism are introduced and derive an analytic form for these reaction amplitudes from which we can study how the reaction rates are related to the structure of various charmed baryons. Actual production rates are estimated by fixing the unknown parameters from the existing data of the strangeness productions for the prediction of charmed sector. |
Thursday, October 25, 2018 8:15PM - 8:30PM |
EK.00005: Threshold Photoproduction of J/ψ at GlueX Alexander Austregesilo The GlueX experiment at Jefferson Lab uses a 12 GeV electron beam to produce tagged photons via coherent Bremsstrahlung. This linearly-polarized photon beam impinges on a liquid-hydrogen target contained within a hermetic detector with near-complete coverage by drift chambers and electromagnetic calorimeters. The available energy range is ideal to study J/ψ production close to threshold at 8.2 GeV, and the energy-dependence of the cross-section is very sensitive to the details of the production mechanism. The cross-section is also closely related to the s-channel production of the pentaquark resonances Pc+(4380) and Pc+(4450) observed by LHCb in J/ψp systems. Taking advantage of the exclusivity of the reaction and the precise knowledge of the beam energy, the GlueX experiment achieves a fine mass resolution and a pure data sample. We will present preliminary results for the cross-section and an upper limit on the Pc+ → J/ψp branching fraction. |
Thursday, October 25, 2018 8:30PM - 8:45PM |
EK.00006: ABSTRACT WITHDRAWN
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Thursday, October 25, 2018 8:45PM - 9:00PM |
EK.00007: Mixing effects of the charmonium and four-quark components in Y(4260) Makoto Takizawa, Sachiko Takeuchi We study the mixing effects of the charmonium and four-quark components in Y(4260) exotic mesons. |
Thursday, October 25, 2018 9:00PM - 9:15PM |
EK.00008: Structure of the Y(4260) and the JP=1- hidden-charm or hidden-strange exotic mesons Sachiko Takeuchi, Makoto Takizawa The q-qbar-s-sbar and q-qbar-c-cbar JPC=1--, 1-+ and charged 1- systems are investigated by a simplified quark cluster model. |
Thursday, October 25, 2018 9:15PM - 9:30PM |
EK.00009: Exotic and Conventional Quarkonium Physics Prospects at Belle II Kurtis Nishimura The Belle II experiment, now operating at the KEK laboratory in Japan, is a substantial upgrade of both the Belle detector and the KEKB $e^+ e^-$ accelerator. It aims to collect 50 times more data than existing B-Factory samples. Belle II is uniquely capable of studying the so-called "XYZ"particles: heavy exotic hadrons consisting of more than three quarks. First discovered by Belle, these now number in the dozens, and represent the emergence of a new category within quantum chromodynamics. This talk will present the capabilities of Belle II to explore both exotic and conventional quarkonium physics. On behalf of the Belle II Collaboration |
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