Multiplicity structure of the hadronic final state in diffractive deep-inelastic scattering at HERA

被引：30

作者：

Adloff, C ^{[1
]}

Anderson, M

Andreev, V

Andrieu, B

Arkadov, V

Ayyaz, I

Babaev, A

Bahr, J

Ban, J

Baranov, P

Barrelet, E

Barschke, R

Bartel, W

Bassler, U

Bate, P

Beck, M

Beglarian, A

Behrend, HJ

Beier, C

Belousov, A

Berger, C

Bernardi, G

Bertrand-Coremans, G

Biddulph, P

Bizot, JC

Borras, K

Boudry, V

Braemer, A

Braunschweig, W

Brisson, V

Brown, DP

Bruckner, W

Bruel, P

Bruncko, D

Burger, J

Busser, 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

Coughlan, JA

机构：

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

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

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

[4] Univ Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, England

[5] Free Univ Brussels, Interuniv Inst High Energies, Brussels, Belgium

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

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

[8] Inst Nucl Phys, Krakow, Poland

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

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

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

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

[13] Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland

[14] DESY, D-2000 Hamburg, Germany

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

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

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

[18] Univ Heidelberg, Inst Hochenergiephys, D-6900 Heidelberg, Germany

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

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

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

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

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

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

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

[26] Univ Aix Marseille 2, CPPM, IN2P3, CNRS, F-13284 Marseille 07, France

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

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

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

[30] Univ Paris Sud, LAL, IN2P3, CNRS, Orsay, France

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

[32] Univ Paris 06, LPNHE, Paris, France

[33] Univ Paris 07, IN2P3, CNRS, Paris, France

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

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

[36] INFN Roma 1, Rome, Italy

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

[38] Paul Scherrer Inst, Villigen, Switzerland

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

[40] DESY, Inst Hochenergiephys, Zeuthen, Germany

[41] ETH Zurich, Inst Phys, Zurich, Switzerland

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

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

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

来源：

EUROPEAN PHYSICAL JOURNAL C | 1998年 / 5卷 / 03期

关键词：

D O I：

10.1007/s100520050287

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 multiplicity structure of the hadronic system X produced in deep-inelastic processes at HERA of the type ep --> eXY, where Y is a hadronic system with mass M-Y < 1.6 GeV and where the squared momentum transfer at the pY vertex, t, is limited to \t\ < 1 GeV2, is studied as a function of the invariant mass M-X of the system X. Results are presented on multiplicity distributions and multiplicity moments, rapidity spectra and forward-backward correlations in the centre-of-mass system of X. The data are compared to results in e+e- annihilation, fixed-target lepton-nucleon collisions, hadro-produced diffractive final states and to non-diffractive hadron-hadron collisions. The comparison suggests a production mechanism of virtual photon dissociation which involves a mixture of partonic states and a significant gluon content. The data are well described by a model, based on a QCD-Regge analysis of the diffractive structure function, which assumes a large hard gluonic component of the colourless exchange at low Q2. A model with soft colour interactions is also successful.

引用

页码：439 / 452

页数：14

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