Title: A new U.S./China theoretical/experimental collaborative effort on baryon resonance extraction through a proposed NSF PIRE project
Authors: Philip Cole for the PIRE: Nucleon Resonance Studies Group: CoPIs: Ralf Gothe, Kyungseon Joo, Steffen Strauch; Chinese Liaisons: Qiang Zhao, Bing-Song Zou, and Senior Personnel and Foreign Collaborators: Inna Aznauryan Volker Burkert, Debra Easterly, Latifa Elouadrhiri, Scott Galen, Bi-Tao Hu, Kevin Kelley, T.-S. Harry Lee, Xue-Qian Li, Victor Mokeev, Angela Petit, and Cong-Feng Qiao
Keywords: NSTAR, Baryon Resonances, JLab,, BEPC, NSF PIRE
Abstract:
Through our recently submitted grant pre-proposal to the NSF Partnerships for International Research and Education (PIRE: Nucleon Resonance Studies), we seek to coordinate research on nucleon resonances among nuclear physicists in the United States and China. This new collaboration will build a bridge between Jefferson Lab (JLab) and the Institute for High Energy Physics (IHEP) in Beijing by combining experimentalists and theorists into a dedicated group focused on better understanding the current and future data from JLab and from the Beijing Electron Positron Collider (BEPC). Recent JLab results on the extraction of single- and double-polarization observables in both the 1π and 2π channel show their high sensitivity to small production amplitudes and therefore their importance for the extraction of resonance parameters. The Beijing Electron Spectrometer (BES) at the BEPC has collected high statistics data on J/ψ production. Its decay into baryon-antibaryon channels offers a unique and complementary way of probing nucleon resonances. JLab has access to N* form factors at high Q2, which is advantageous for the study of dynamical properties of nucleon resonances, while the low-background BES results will be able to provide guidance for the search for less-dominant excited states at JLab. Moreover, with the recently approved experimental proposal 揘 ucleon Resonance Studies with CLAS12?and the high-quality data streaming from BEPC-II and CLAS6, the time has come for forging this new Trans-Pacific collaboration of theorists and experimentalists on NSTAR physics.
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