Diffractive dijet production at HERA

被引：55

作者：

Adloff, C ^{[1
]}

Anderson, M

Andreev, V

Andrieu, B

Arkadov, V

Arndt, C

Ayyaz, I

Babaev, A

Bähr, J

Bán, J

Baranov, P

Barrelet, E

Barschke, R

Bartel, W

Bassler, U

Bate, P

Beck, M

Beglarian, A

Behnke, O

Behrend, HJ

Beier, C

Belousov, A

Berger, C

Bernardi, G

Bertrand-Coremans, G

Biddulph, P

Bizot, JC

Boudry, V

Braemer, A

Braunschweig, W

Brisson, V

Brown, DP

Brückner, W

Bruel, P

Bruncko, D

Bürger, J

Büsser, FW

Buniatian, A

Burke, S

Buschhorn, G

Calvet, D

Campbell, AJ

Carli, T

Chabert, E

Charlet, M

Clarke, D

Clerbaux, B

Cocks, S

Contreras, JG

Cormack, C

机构：

[1] Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany

[2] Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, Germany

[3] Univ Birmingham, Sch Phys & Space Res, Birmingham, W Midlands, England

[4] ULB, VUB, Inter Univ Inst High Energies, Brussels, Belgium

[5] Univ Instelling Antwerp, B-2610 Wilrijk, Belgium

[6] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[7] Inst Nucl Phys, Krakow, Poland

[8] Univ Calif Davis, Dept Phys, Davis, CA USA

[9] Univ Calif Davis, IIRPA, Davis, CA USA

[10] Univ Dortmund, Inst Phys, D-4600 Dortmund, Germany

[11] CEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, France

[12] DESY, D-2000 Hamburg, Germany

[13] Univ Hamburg, Inst Expt Phys 2, D-2000 Hamburg, Germany

[14] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[15] Univ Heidelberg, Inst Phys, D-6900 Heidelberg, Germany

[16] Univ Heidelberg, Inst Hochenergiephys, Heidelberg, Germany

[17] Univ Kiel, Inst Expt & Angew Phys, Kiel, Germany

[18] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia

[19] Univ Lancaster, Sch Phys & Chem, Lancaster, England

[20] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[21] Univ London Queen Mary & Westfield Coll, London E1 4NS, England

[22] Univ Lund, Dept Phys, Lund, Sweden

[23] Univ Manchester, Dept Phys & Astron, Manchester, Lancs, England

[24] Univ Aix Marseille 2, CNRS, IN2P3, CPPM, Marseille, France

[25] Inst Theoret & Expt Phys, Moscow 117259, Russia

[26] PN Lebedev Phys Inst, Moscow 117924, Russia

[27] Max Planck Inst Phys, D-80805 Munich, Germany

[28] Univ Paris Sud, CNRS, IN2P3, LPNHE, Orsay, France

[29] Ecole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, France

[30] Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France

[31] Univ Paris 07, CNRS, IN2P3, LPNHE, Paris, France

[32] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic

[33] Charles Univ, Nucl Ctr, Prague, Czech Republic

[34] Univ Roma 3, INFN Roma 1, Rome, Italy

[35] Univ Roma 3, Dipartimento Fis, Rome, Italy

[36] Paul Scherrer Inst, Villigen, Switzerland

[37] Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany

[38] Inst Hochenergiephys, DESY, D-1615 Zeuthen, Germany

[39] ETH Zurich, Inst Teilchenphys, Zurich, Switzerland

[40] Univ Zurich, Inst Phys, Zurich, Switzerland

[41] Humboldt Univ, Inst Phys, Berlin, Germany

[42] Berg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, Germany

来源：

EUROPEAN PHYSICAL JOURNAL C | 1999年 / 6卷 / 03期

关键词：

D O I：

10.1007/s100520050353

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：

Interactions of the type ep --> eXY are studied, where the component X of the hadronic final state contains two jets and is well separated in rapidity from a leading baryonic system Y. Analyses are performed of both resolved and direct photoproduction and of deep-inelastic scattering with photon virtualities in the range 7.5 < Q(2) < 80 GeV2. Cross sections are presented where Y has mass M-y < 1.6 GeV, the squared four-momentum transferred at the proton vertex satisfies \t\ < 1 GcV(2) and the two jets each have transverse momentum p(T)(jet) > 5 GeV relative to the photon direction in the rest frame of X. Models based on a factorisable diffractive exchange with a gluon dominated structure, evolved to a scale set by the transverse momentum (p) over cap(T) of the outgoing partons front the hard interaction. give good descriptions of the data. Exclusive q (q) over bar production, as calculated in perturbative QCD using the squared proton gluon density, represents at most a small fraction of the measured cross section. The compatibility of the data with a breaking of diffractive factorisation due to spectator interactions in resolved photoproduction is investigated.

引用

页码：421 / 436

页数：16

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