Production of e+e- pairs accompanied by nuclear dissociation in ultraperipheral heavy-ion collisions -: art. no. 031902

被引：106

作者：

Adams, J ^{[1
]}

Aggarwal, MM

Ahammed, Z

Amonett, J

Anderson, BD

Arkhipkin, D

Averichev, GS

Bai, Y

Balewski, J

Barannikova, O

Barnby, LS

Baudot, J

Bekele, S

Belaga, VV

Bellwied, R

Berger, J

Bezverkhny, BI

Bharadwaj, S

Bhatia, VS

Bichsel, H

Billmeier, A

Bland, LC

Blyth, CO

Bonner, BE

Botje, M

Boucham, A

Brandin, A

Bravar, A

Bystersky, M

Cadman, RV

Cai, XZ

Caines, H

Sánchez, MCD

Carroll, J

Castillo, J

Cebra, D

Chajecki, Z

Chaloupka, P

Chattopdhyay, S

Chen, HF

Chen, Y

Cheng, J

Cherney, M

Chikanian, A

Christie, W

Coffin, JP

Cormier, TM

Cramer, JG

Crawford, HJ

Das, D

机构：

[1] Univ Birmingham, Birmingham, W Midlands, England

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Brookhaven Natl Lab, Upton, NY 11973 USA

[4] CALTECH, Pasadena, CA 91125 USA

[5] Univ Calif Berkeley, Berkeley, CA 94720 USA

[6] Univ Calif Davis, Davis, CA 95616 USA

[7] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[8] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[9] Creighton Univ, Omaha, NE 68178 USA

[10] Nucl Phys Inst AS CR, Rez 25068, Czech Republic

[11] Lab High Energy JINR, Dubna, Russia

[12] Particle Phys Lab JINR, Dubna, Russia

[13] Goethe Univ Frankfurt, D-6000 Frankfurt, Germany

[14] Inst Phys, Bhubaneswar 751005, Orissa, India

[15] Indian Inst Technol, Bombay 400076, Maharashtra, India

[16] Indiana Univ, Bloomington, IN 47408 USA

[17] Inst Rech Subatom, Strasbourg, France

[18] Univ Jammu, Jammu 180001, India

[19] Kent State Univ, Kent, OH 44242 USA

[20] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[21] MIT, Cambridge, MA 02139 USA

[22] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[23] Michigan State Univ, E Lansing, MI 48824 USA

[24] Moscow Phys Engn Inst, Moscow, Russia

[25] CUNY City Coll, New York, NY 10031 USA

[26] NIKHEF, Amsterdam, Netherlands

[27] Ohio State Univ, Columbus, OH 43210 USA

[28] Panjab Univ, Chandigarh 160014, India

[29] Penn State Univ, University Pk, PA 16802 USA

[30] Inst High Energy Phys, Protvino, Russia

[31] Purdue Univ, W Lafayette, IN 47907 USA

[32] Univ Rajasthan, Jaipur 302004, Rajasthan, India

[33] Rice Univ, Houston, TX 77251 USA

[34] Univ Sao Paulo, Sao Paulo, Brazil

[35] Univ Sci & Technol China, Anhui 230027, Peoples R China

[36] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[37] SUBATECH, Nantes, France

[38] Texas A&M Univ, College Stn, TX 77843 USA

[39] Univ Texas, Austin, TX 78712 USA

[40] Tsinghua Univ, Beijing 100084, Peoples R China

[41] Valparaiso Univ, Valparaiso, IN 46383 USA

[42] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India

[43] Warsaw Univ Technol, Warsaw, Poland

[44] Univ Washington, Seattle, WA 98195 USA

[45] Wayne State Univ, Detroit, MI 48201 USA

[46] CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China

[47] Yale Univ, New Haven, CT 06520 USA

[48] Univ Zagreb, HR-10002 Zagreb, Croatia

来源：

PHYSICAL REVIEW C | 2004年 / 70卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.70.031902

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We present data on e(+)e(-) pair production accompanied by nuclear breakup in ultraperipheral gold-gold collisions at a center of mass energy of 200 GeV per nucleon pair. The nuclear breakup requirement selects events at small impact parameters, where higher-order diagrams for pair production should be enhanced. We compare the data with two calculations: one based on the equivalent photon approximation, and the other using lowest-order quantum electrodynamics (QED). The data distributions agree with both calculations, except that the pair transverse momentum spectrum disagrees with the equivalent photon approach. We set limits on higher-order contributions to the cross section.

引用

页码：0319021 / 0319026

页数：6

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