Forward π°-meson production at HERA

被引：35

作者：

Adloff, C ^{[1
]}

Andreev, V

Andrieu, B

Arkadov, V

Astvatsatourov, A

Ayyaz, I

Babaev, A

Bähr, J

Baranov, P

Barrelet, E

Bartel, W

Bassler, U

Bate, P

Beglarian, A

Behnke, O

Beier, C

Belousov, A

Benisch, T

Berger, C

Bernardi, G

Berndt, T

Bertrand-Coremans, G

Biddulph, P

Bizot, JC

Borras, K

Boudry, V

Braunschweig, W

Brisson, V

Bröker, HB

Brown, DP

Brückner, W

Bruel, P

Bruncko, D

Bürger, J

Büsser, FW

Bunyatyan, A

Burke, S

Burrage, A

Buschhorn, G

Campbell, AJ

Cao, J

Carli, T

Chabert, E

Charlet, M

Clarke, D

Clerbaux, B

Collard, C

Contreras, JG

Coughlan, JA

Cousinou, MC

机构：

[1] Berg Univ 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] ULB VUB, Interuniv Inst High Energies, Brussels, Belgium

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

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

[8] Inst Nucl Phys, Krakow, Poland

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

[10] Joint Inst Nucl Res, Dubna, Russia

[11] CEA Saclay, DSM DAPNIA, 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] Heidelberg Univ, Inst Phys, D-6900 Heidelberg, Germany

[16] Heidelberg Univ, 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] Queen Mary Univ London, London E1 4NS, England

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

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

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

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

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

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

[28] Univ Paris 11, LAL, CNRS, IN2P3, Orsay, France

[29] Ecole Polytech, LPNHE, CNRS, IN2P3, Palaiseau, France

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

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

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

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

[34] INFN Roma 1, Rome, Italy

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

[36] Paul Scherrer Inst, Villigen, Switzerland

[37] DESY, Zeuthen, Germany

[38] Swiss Fed Inst Technol, Inst Teilchenphys, Zurich, Switzerland

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

[40] Berg Univ Wuppertal, Rechenzentrum, Wuppertal, Germany

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

[42] Safarik Univ, SK-04154 Kosice, Slovakia

来源：

PHYSICS LETTERS B | 1999年 / 462卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(99)00906-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

High transverse momentum pi(o)-mesons have been measured with the H1 detector at HERA in deep-inelastic ep scattering events at low Bjorken-x, down to x approximate to 4 . 10(-5). The measurement is performed in a region of small angles with respect to the proton remnant in the laboratory frame of reference, namely the forward region. and corresponds to central rapidity in the centre of mass system of the virtual photon and proton. This region is expected to be particularly sensitive to QCD effects in hadronic final states. Differential cross-sections for inclusive pi(o)-meson production are presented as a function of Bjorken-x and the four-momentum transfer squared, Q(2), and as a function of transverse momentum and pseudorapidity. A recent numerical BFKL calculation and predictions from QCD models based on DGLAP parton evolution are compared with the data. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：440 / 452

页数：13

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