Coherent diffractive photoproduction of rho(0) mesons on gold nuclei at 200 GeV/nucleon-pair at the Relativistic Heavy Ion Collider

doi:10.1103/PhysRevC.96.054904

	Coherent diffractive photoproduction of rho(0) mesons on gold nuclei at 200 GeV/nucleon-pair at the Relativistic Heavy Ion Collider
	Adamczyk, L.1; Adkins, J. K.2; Agakishiev, G.3; Aggarwal, M. M.4; Ahammed, Z.5; Ajitanand, N. N.6; Alekseev, I.7,8; Anderson, D. M.9; Aoyama, R.10; Aparin, A.3
刊名	PHYSICAL REVIEW C
	2017-11-13
卷号	96 页码:12
ISSN号	2469-9985
DOI	10.1103/PhysRevC.96.054904
英文摘要	The STAR Collaboration reports on the photoproduction of pi(+) pi(-) pairs in gold-gold collisions at a center-of-mass energy of 200 GeV/nucleon-pair. These pion pairs are produced when a nearly real photon emitted by one ion scatters from the other ion. We fit the pi(+) pi(-) invariant-mass spectrum with a combination of rho(0) and omega resonances and a direct pi(+) pi(-) continuum. This is the first observation of the omega in ultraperipheral collisions, and the first measurement of rho-omega interference at energies where photoproduction is dominated by Pomeron exchange. The omega amplitude is consistent with the measured gamma p -> omega p cross section, a classical Glauber calculation, and the omega -> pi(+) pi(-) branching ratio. The omega phase angle is similar to that observed at much lower energies, showing that the rho-omega phase difference does not depend significantly on photon energy. The rho(0) differential cross section d sigma/dt exhibits a clear diffraction pattern, compatible with scattering from a gold nucleus, with two minima visible. The positions of the diffractive minima agree better with the predictions of a quantum Glauber calculation that does not include nuclear shadowing than with a calculation that does include shadowing.
资助项目	RHIC Operations Group ; RCF at BNL ; NERSC Center at LBNL ; Open Science Grid consortium ; Office of Nuclear Physics within U.S. DOE Office of Science ; U.S. National Science Foundation ; Ministry of Education and Science of the Russian Federation ; National Natural Science Foundation of China ; Chinese Academy of Science ; Ministry of Science and Technology of China ; Chinese Ministry of Education ; National Research Foundation of Korea ; GA and MSMT of the Czech Republic ; Department of Atomic Energy of the Government of India ; Department of Science and Technology of the Government of India ; National Science Centre of Poland ; National Research Foundation of Croatia ; Ministry of Science, Education and Sports of the Republic of Croatia ; RosAtom of Russia ; German Bundesministerium fur Bildung, Wissenschaft, Forschung and Technologie (BMBF) ; Helmholtz Association
WOS关键词	J/PSI PHOTOPRODUCTION ; PERIPHERAL COLLISIONS ; STAR ; INTERFERENCE ; DISSOCIATION ; PARAMETERS ; ENERGIES ; MASS ; LHC
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000414957500004
资助机构	RHIC Operations Group ; RCF at BNL ; NERSC Center at LBNL ; Open Science Grid consortium ; Office of Nuclear Physics within U.S. DOE Office of Science ; U.S. National Science Foundation ; Ministry of Education and Science of the Russian Federation ; National Natural Science Foundation of China ; Chinese Academy of Science ; Ministry of Science and Technology of China ; Chinese Ministry of Education ; National Research Foundation of Korea ; GA and MSMT of the Czech Republic ; Department of Atomic Energy of the Government of India ; Department of Science and Technology of the Government of India ; National Science Centre of Poland ; National Research Foundation of Croatia ; Ministry of Science, Education and Sports of the Republic of Croatia ; RosAtom of Russia ; German Bundesministerium fur Bildung, Wissenschaft, Forschung and Technologie (BMBF) ; Helmholtz Association
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/45980]
专题	中国科学院近代物理研究所
通讯作者	Adamczyk, L.
作者单位	1.AGH Univ Sci & Technol, FPACS, PL-30059 Krakow, Poland 2.Univ Kentucky, Lexington, KY 40506 USA 3.Joint Inst Nucl Res, Dubna 141980, Russia 4.Panjab Univ, Chandigarh 160014, India 5.Variable Energy Cyclotron Ctr, Kolkata 700064, India 6.SUNY Stony Brook, Stony Brook, NY 11794 USA 7.Alikhanov Inst Theoret & Expt Phys, Moscow 117218, Russia 8.Nat Res Nucl Univ MEPhI, Moscow 115409, Russia 9.Texas A&M Univ, College Stn, TX 77843 USA 10.Univ Tsukuba, Tsukuba, Ibaraki, Japan
推荐引用方式 GB/T 7714	Adamczyk, L.,Adkins, J. K.,Agakishiev, G.,et al. Coherent diffractive photoproduction of rho(0) mesons on gold nuclei at 200 GeV/nucleon-pair at the Relativistic Heavy Ion Collider[J]. PHYSICAL REVIEW C,2017,96:12.
APA	Adamczyk, L..,Adkins, J. K..,Agakishiev, G..,Aggarwal, M. M..,Ahammed, Z..,...&Zyzak, M..(2017).Coherent diffractive photoproduction of rho(0) mesons on gold nuclei at 200 GeV/nucleon-pair at the Relativistic Heavy Ion Collider.PHYSICAL REVIEW C,96,12.
MLA	Adamczyk, L.,et al."Coherent diffractive photoproduction of rho(0) mesons on gold nuclei at 200 GeV/nucleon-pair at the Relativistic Heavy Ion Collider".PHYSICAL REVIEW C 96(2017):12.