Measurement of the hadronic cross-section for the scattering of two virtual photons at LEP

被引:26
作者
Abbiendi, G [1 ]
Ainsley, C
Åkesson, PF
Alexander, G
Allison, J
Anagnostou, G
Anderson, KJ
Arcelli, S
Asai, S
Axen, D
Azuelos, G
Bailey, I
Barberio, E
Barlow, RJ
Batley, RJ
Behnke, T
Bell, KW
Bell, PJ
Bella, G
Bellerive, A
Bethke, S
Biebel, O
Bloodworth, IJ
Boeriu, O
Bock, P
Böhme, J
Bonacorsi, D
Boutemeur, M
Braibant, S
Brigliadori, L
Brown, RM
Burckhart, HJ
Cammin, J
Carnegie, RK
Caron, B
Carter, AA
Carter, JR
Chang, CY
Charlton, DG
Clarke, PEL
Clay, E
Cohen, I
Couchman, J
Csilling, A
Cuffiani, M
Dado, S
Dallavalle, GM
Dallison, S
De Roeck, A
De Wolf, EA
机构
[1] Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy
[2] Ist Nazl Fis Nucl, I-40126 Bologna, Italy
[3] Univ Bonn, Inst Phys, D-53115 Bonn, Germany
[4] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA
[5] Cavendish Lab, Cambridge CB3 0HE, England
[6] Carleton Univ, Dept Phys, Ottawa Carleton Inst Phys, Ottawa, ON K1S 5B6, Canada
[7] CERN, European Org Nucl Res, CH-1211 Geneva 23, Switzerland
[8] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[9] Univ Chicago, Dept Phys, Chicago, IL 60637 USA
[10] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany
[11] Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany
[12] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA
[13] Queen Mary Univ London, London E1 4NS, England
[14] Tech Hsch Aachen, Inst Phys 3, D-52056 Aachen, Germany
[15] UCL, London WC1E 6BT, England
[16] Univ Manchester, Schuster Lab, Dept Phys, Manchester M13 9PL, Lancs, England
[17] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[18] Univ Montreal, Phys Nucl Lab, Montreal, PQ H3C 3J7, Canada
[19] Univ Oregon, Dept Phys, Eugene, OR 97403 USA
[20] CLRC, Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[21] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel
[22] Tel Aviv Univ, Dept Phys & Astron, IL-69978 Tel Aviv, Israel
[23] Univ Tokyo, Int Ctr Elementary Particle Phys, Tokyo 1130033, Japan
[24] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
[25] Kobe Univ, Kobe, Hyogo 6578501, Japan
[26] Weizmann Inst Sci, Particle Phys Dept, IL-76100 Rehovot, Israel
[27] Univ Hamburg, DESY, Inst Expt Phys 2, D-22607 Hamburg, Germany
[28] Univ Victoria, Dept Phys, Victoria, BC V8W 3P6, Canada
[29] Univ British Columbia, Dept Phys, Vancouver, BC V6T 1Z1, Canada
[30] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada
[31] Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary
[32] Inst Nucl Res, H-4001 Debrecen, Hungary
[33] Univ Munich, Sekt Phys, D-85748 Garching, Germany
[34] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
[35] Yale Univ, Dept Phys, New Haven, CT 06520 USA
[36] TRIUMF, Vancouver, BC V6T 2A3, Canada
[37] Nucl Res Inst, Debrecen, Hungary
[38] Univ Min & Met Krakow, Krakow, Poland
[39] Univ Debrecen, Dept Expt Phys, Debrecen, Hungary
[40] MPI Extraterr Phys, Munich, Germany
[41] Res Inst Particle & Nucl Phys, Budapest, Hungary
[42] Univ Calif Riverside, Hight Energy Phys Grp, Riverside, CA 92521 USA
[43] CERN, Div EP, CH-1211 Geneva 23, Switzerland
[44] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel
[45] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England
来源
EUROPEAN PHYSICAL JOURNAL C | 2002年 / 24卷 / 01期
关键词
D O I
10.1007/s100520200940
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
The interaction of virtual photons is investigated using the reaction e(+)e(-) --> e(+)e(-) hadrons based on data taken by the OPAL experiment at e(+)e(-) centre-of-mass energies roots(ec) = 189-209 GeV, for W > 5 GeV and at an average Q(2) of 17.9 GeV(2). The measured cross-sections are compared to predictions of the Quark Parton Model (QPM), to the Leading Order QCD Monte Carlo model PHOJET, to the NLO prediction for the reaction e(+)e(-) --> e(+)e(-) q (q) over bar, and to BFKL calculations. PHOJET, NLO e(+)e(-) --> e(+)e(-) q (q) over bar, and QPM describe the data reasonably well, whereas the cross-section predicted by a Leading Order BFKL calculation is too large.
引用
收藏
页码:17 / 31
页数:15
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