Bulletin of the American Physical Society
84th Annual Meeting of the APS Southeastern Section
Volume 62, Number 13
Thursday–Saturday, November 16–18, 2017; Milledgeville, Georgia
Session J2: The Hadron Spectra as Probes of QCD |
Hide Abstracts |
Chair: Volker Crede, Florida State University, Tallahassee Room: MSU Building University Banquet Room B |
Saturday, November 18, 2017 8:30AM - 9:00AM |
J2.00001: Recent Results from the GlueX Experiment Invited Speaker: Sean Dobbs Hybrid mesons are composed of a quark-antiquark pair bound by an excited gluonic field. The study of such states will provide valuable information on contribution of gluonic degrees of freedom in the confinement region of QCD. Although a spectrum of hybrid meson states has been long predicted, there is experimental evidence for only a few hybrids. The GlueX experiment at Jefferson Lab combines a spectrometer with nearly full acceptance for charged and neutral particles and a liquid hydrogen target with a tagged photon beam whose flux and linear polarization peak at 9 GeV. After a commissioning run in 2016, a multi-year data taking campaign began in Spring 2017 with the intent to study the spectrum of light mesons and determine the spectrum of hybrid mesons. First physics results from the existing data will be shown, including beam asymmetries and charmonium production near threshold, and future plans will be discussed. [Preview Abstract] |
Saturday, November 18, 2017 9:00AM - 9:30AM |
J2.00002: QCD spectrum and resonance decay widths from lattice QCD Invited Speaker: Colin Morningstar Recent progress in calculating the hadron spectrum in lattice QCD is described. Recent calculations of various resonance decay widths using new techniques in lattice QCD are also presented. The latest studies can incorporate multiple decay channels and multiple partial waves. [Preview Abstract] |
Saturday, November 18, 2017 9:30AM - 10:00AM |
J2.00003: Spectroscopy Results with Polarization Observables in Vector Meson Photoproduction at CLAS Invited Speaker: Priyashree Roy Understanding the baryon spectrum is key to comprehend the underlying dynamics of quark-gluon interactions in baryons. Due to the broad and overlapping nature of baryon resonances, identifying them is very challenging, particularly above $1.7$ GeV c.m. energies. Therefore, in addition to unpolarized cross sections, polarization observables are necessary to isolate resonance contributions from other interference terms. These high-mass excited states are predicted to have strong couplings to final states involving a heavier meson, such as the vector mesons $\omega$ and $\rho$. The photoproduction of these final states have mostly remained unexplored, but their study can significantly contribute towards establishing nuclear resonances. I will present results on polarization observables extracted from a comprehensive analysis of $\omega$ and $\pi^{+}\,\pi^{-}$ photoproduction reactions off a proton using a polarized beam and a FROzen Spin Target at Jefferson Laboratory. The experiment used the CLAS spectrometer and covered c.m. energies up to $2.5$ GeV. Many of these observables are first-time measurements, thus substantially augmenting the world database of polarization observables for these reactions. I will also present results of a partial-wave analysis within the BnGa framework that is based on this new CLAS data. [Preview Abstract] |
Saturday, November 18, 2017 10:00AM - 10:30AM |
J2.00004: Hadron Spectroscopy and JPAC Activities Invited Speaker: Andrew Jackura I will discuss aspects of hadron spectroscopy and the Joint Physics Analysis Center's (JPAC) role in the development of modern analysis tools. JPAC is a joint effort between theorists, experimentalists, and phenomenologists who work together to develop models and analysis tools for the next generation of high-precision, high-statistics data. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700