Measurement of leading proton and neutron production in deep-inelastic scattering at HERA

被引：85

作者：

Adloff, C ^{[1
]}

Anderson, M

Andreev, V

Andrieu, B

Arkadov, V

Arndt, C

Ayyaz, I

Babaev, A

Bähr, J

Baranov, P

Barrelet, E

Bartel, W

Bassler, U

Bate, P

Beglarian, A

Behnke, O

Behrend, HJ

Beier, C

Belousov, A

Berger, C

Bernardi, G

Berndt, T

Bertrand-Coremans, G

Biddulph, P

Bizot, JC

Boudry, V

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

Coughlan, JA

Cousinou, MC

Cox, BE

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, ULB, Inter Univ 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] Joint Inst Nucl Res, Dubna, Russia

[13] CEA, DSM, DAPNIA, Gif Sur Yvette, France

[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, CNRS, IN2P3, CPPM, 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, CNRS, IN2P3, LAL, Orsay, France

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

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

[33] Univ Paris 07, LPNHE, CNRS, IN2P3, 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] DESY, Inst Hochenergiephys, Zeuthen, Germany

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

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

[42] Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany

[43] CINVESTAV, Dept Fis Ap, Merida, Yucatan, Mexico

来源：

EUROPEAN PHYSICAL JOURNAL C | 1999年 / 6卷 / 04期

关键词：

D O I：

10.1007/s100520050368

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：

Deep-inelastic scattering events with a leading baryon have been detected by the I-IL experiment at HERA using a forward proton spectrometer and a forward neutron calorimeter. Semi-inclusive cross sections have been measured in the kinematic region 2 less than or equal to Q(2) less than or equal to 50GeV(2), 6 x 10(-5) less than or equal to x less than or equal to 6 x 10(-3) and baryon p(T) less than or equal to 200 MeV, for events with a final-state proton with energy 580 less than or equal to E' less than or equal to 740 GeV, or a neutron with energy E' greater than or equal to 160 GeV. The measurements are used to test production models and factorization hypotheses. A Regge model of leading baryon production which consists of pion, pomeron and secondary reggeon exchanges gives an acceptable description of both semi-inclusive cross sections in the region 0.7 less than or equal to E'/E-p less than or equal to 0.9, where E-p is the proton beam energy. The leading neutron data are used to estimate for the first time the structure function of the pion at small Bjorken-x.

引用

页码：587 / 602

页数：16

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