J/{psi} polarization in photoproduction up to the next-to-leading order of QCD
We investigate the J/{psi} polarization in photoproduction at the Hadron Electron Ring Accelerator (HERA) up to the next-to-leading order of QCD. The results show that the transverse momentum p{sub t} and energy fraction z distributions of J/{psi} production do not agree with the observed ones very...
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Veröffentlicht in: | Physical review. D, Particles and fields Particles and fields, 2009-08, Vol.80 (3) |
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container_title | Physical review. D, Particles and fields |
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creator | Chang Chaohsi Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100080 Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing, 100049 Li Rong Wang Jianxiong |
description | We investigate the J/{psi} polarization in photoproduction at the Hadron Electron Ring Accelerator (HERA) up to the next-to-leading order of QCD. The results show that the transverse momentum p{sub t} and energy fraction z distributions of J/{psi} production do not agree with the observed ones very well. The theoretical uncertainties for the z distributions of the J/{psi} polarization parameters with respect to various choices of the renormalization and factorization scales are too large to give a definite predication. The uncertainties for the p{sub t} distributions of these parameters are small when p{sub t}>3 GeV and the obtained p{sub t} distributions cannot describe the experimental data even in this region. |
doi_str_mv | 10.1103/PHYSREVD.80.034020 |
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The results show that the transverse momentum p{sub t} and energy fraction z distributions of J/{psi} production do not agree with the observed ones very well. The theoretical uncertainties for the z distributions of the J/{psi} polarization parameters with respect to various choices of the renormalization and factorization scales are too large to give a definite predication. The uncertainties for the p{sub t} distributions of these parameters are small when p{sub t}>3 GeV and the obtained p{sub t} distributions cannot describe the experimental data even in this region.</description><identifier>ISSN: 0556-2821</identifier><identifier>EISSN: 1089-4918</identifier><identifier>DOI: 10.1103/PHYSREVD.80.034020</identifier><language>eng</language><publisher>United States</publisher><subject>ELECTRON-RING ACCELERATORS ; FACTORIZATION ; GEV RANGE 01-10 ; HERA STORAGE RING ; J PSI-3097 MESONS ; PHOTOPRODUCTION ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; POLARIZATION ; QUANTUM CHROMODYNAMICS ; RENORMALIZATION ; TRANSVERSE MOMENTUM</subject><ispartof>Physical review. 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D, Particles and fields</title><description>We investigate the J/{psi} polarization in photoproduction at the Hadron Electron Ring Accelerator (HERA) up to the next-to-leading order of QCD. The results show that the transverse momentum p{sub t} and energy fraction z distributions of J/{psi} production do not agree with the observed ones very well. The theoretical uncertainties for the z distributions of the J/{psi} polarization parameters with respect to various choices of the renormalization and factorization scales are too large to give a definite predication. The uncertainties for the p{sub t} distributions of these parameters are small when p{sub t}>3 GeV and the obtained p{sub t} distributions cannot describe the experimental data even in this region.</description><subject>ELECTRON-RING ACCELERATORS</subject><subject>FACTORIZATION</subject><subject>GEV RANGE 01-10</subject><subject>HERA STORAGE RING</subject><subject>J PSI-3097 MESONS</subject><subject>PHOTOPRODUCTION</subject><subject>PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</subject><subject>POLARIZATION</subject><subject>QUANTUM CHROMODYNAMICS</subject><subject>RENORMALIZATION</subject><subject>TRANSVERSE MOMENTUM</subject><issn>0556-2821</issn><issn>1089-4918</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNqNistqwzAQAEVJoU7TH8hpoWc5K8kJ9jkPQg-hLwo5GSMrsYrRCmsDpaH_3hD6AZ3LwDBCTBXmSqGZPW_3b6_rj1VeYo6mQI03IlNYVrKoVDkSGc7nC6lLre7EOKVPvKAXJhO7p9k5Jv8Dkfpm8N8NewrgA8SOmOJA7cle0ykCE3DnILgvlkyyd03rwxFoaN0AdICX5Woibg9Nn9zDn-_F42b9vtxKSuzrZD0721kKwVmutTJam6Iy_7t-ATnURb8</recordid><startdate>20090801</startdate><enddate>20090801</enddate><creator>Chang Chaohsi</creator><creator>Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100080</creator><creator>Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing, 100049</creator><creator>Li Rong</creator><creator>Wang Jianxiong</creator><scope>OTOTI</scope></search><sort><creationdate>20090801</creationdate><title>J/{psi} polarization in photoproduction up to the next-to-leading order of QCD</title><author>Chang Chaohsi ; Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100080 ; Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing, 100049 ; Li Rong ; Wang Jianxiong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-osti_scitechconnect_213223493</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>ELECTRON-RING ACCELERATORS</topic><topic>FACTORIZATION</topic><topic>GEV RANGE 01-10</topic><topic>HERA STORAGE RING</topic><topic>J PSI-3097 MESONS</topic><topic>PHOTOPRODUCTION</topic><topic>PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</topic><topic>POLARIZATION</topic><topic>QUANTUM CHROMODYNAMICS</topic><topic>RENORMALIZATION</topic><topic>TRANSVERSE MOMENTUM</topic><toplevel>online_resources</toplevel><creatorcontrib>Chang Chaohsi</creatorcontrib><creatorcontrib>Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100080</creatorcontrib><creatorcontrib>Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing, 100049</creatorcontrib><creatorcontrib>Li Rong</creatorcontrib><creatorcontrib>Wang Jianxiong</creatorcontrib><collection>OSTI.GOV</collection><jtitle>Physical review. D, Particles and fields</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chang Chaohsi</au><au>Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100080</au><au>Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing, 100049</au><au>Li Rong</au><au>Wang Jianxiong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>J/{psi} polarization in photoproduction up to the next-to-leading order of QCD</atitle><jtitle>Physical review. D, Particles and fields</jtitle><date>2009-08-01</date><risdate>2009</risdate><volume>80</volume><issue>3</issue><issn>0556-2821</issn><eissn>1089-4918</eissn><abstract>We investigate the J/{psi} polarization in photoproduction at the Hadron Electron Ring Accelerator (HERA) up to the next-to-leading order of QCD. The results show that the transverse momentum p{sub t} and energy fraction z distributions of J/{psi} production do not agree with the observed ones very well. The theoretical uncertainties for the z distributions of the J/{psi} polarization parameters with respect to various choices of the renormalization and factorization scales are too large to give a definite predication. The uncertainties for the p{sub t} distributions of these parameters are small when p{sub t}>3 GeV and the obtained p{sub t} distributions cannot describe the experimental data even in this region.</abstract><cop>United States</cop><doi>10.1103/PHYSREVD.80.034020</doi></addata></record> |
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source | American Physical Society Journals |
subjects | ELECTRON-RING ACCELERATORS FACTORIZATION GEV RANGE 01-10 HERA STORAGE RING J PSI-3097 MESONS PHOTOPRODUCTION PHYSICS OF ELEMENTARY PARTICLES AND FIELDS POLARIZATION QUANTUM CHROMODYNAMICS RENORMALIZATION TRANSVERSE MOMENTUM |
title | J/{psi} polarization in photoproduction up to the next-to-leading order of QCD |
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