D*± meson production in deep-inelastic diffractive interactions at HERA

被引：30

作者：

Adloff, C ^{[1
]}

Andreev, V

Andrieu, B

Anthonis, T

Arkadov, V

Astvatsatourov, A

Babaev, A

Báhr, J

Baranov, P

Barrelet, E

Bartel, W

Bate, P

Becker, J

Beglarian, A

Behnke, O

Beier, C

Belousov, A

Benisch, T

Berger, C

Berndt, T

Bizot, JC

Boehme, J

Boudry, V

Braunschweig, W

Brisson, V

Bröker, HB

Brown, DP

Brückner, W

Bruncko, D

Bürger, J

Büsser, FW

Bunyatyan, A

Burrage, A

Buschhorn, G

Bystritskaya, L

Campbell, AJ

Cao, J

Caron, S

Cassol-Brunner, F

Clarke, D

Clerbaux, B

Collard, C

Contreras, JG

Coppens, YR

Coughlan, JA

Cousinou, MC

Cox, BE

Cozzika, G

Cvach, J

Dainton, JB

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] VUB, ULB, 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 Phys Nucl, Krakow, Poland

[9] Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany

[10] Joint Nucl Res Inst, Dubna, Russia

[11] CE Saclay, CEA, DSM, DAPNIA, 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, Kirchhoff Inst Phys, 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, Manchester M13 9PL, Lancs, England

[24] Univ Mediterranee, CPPM, CNRS, IN2P3, Marseille, France

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

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

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

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

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

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

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

[32] Charles Univ, Fac Math & Phys, Prague, Czech Republic

[33] Univ Roma Tre, Dipartimento Fis, Rome, Italy

[34] INFN Roma 3, Rome, Italy

[35] Paul Scherrer Inst, Villigen, Switzerland

[36] Yerevan Phys Inst, Yerevan 375036, Armenia

[37] DESY, Zeuthen, Germany

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

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

[40] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece

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

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

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

[44] Univ PJ Safarik, Kosice, Slovakia

[45] CERN, CH-1211 Geneva 23, Switzerland

[46] CINVESTAV, Dept Fis, Mexico City, DF, Mexico

来源：

PHYSICS LETTERS B | 2001年 / 520卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(01)01155-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A measurement is presented of the cross section for D*+/- meson production in diffractive deep-inelastic scattering for the first time at HERA. The cross section is given for the process ep --> eXY, where the system X contains at least one D*+/- meson and is separated by a large rapidity gap from a low mass proton remnant system Y. The cross section is presented in the diffractive deep-inelastic region defined by 2 < Q(2) < 100 GeV2, 0.05 < y < 0.7, x(P) < 0.04, M-Y < 1.6 GeV and \t \ < 1 GeV2. The D*+/- mesons are restricted to the range P-T,P-D* > 2 GeV and \ eta (D*)\ < 1.5. The cross section is found to be 246 +/- 54 +/- 56 ph and forms about 6% of the corresponding inclusive D*+/- cross section. The cross section is presented as a function of various kinematic variables, including z(P)(obs) which is an estimate of the fraction of the momentum of the diffractive exchange carried by the parton entering the hard-subprocess. The data show a large component of the cross section at low Z(obs)(P) where the contribution of the boson-gluon-fusion process is expected to dominate. The data are compared with several QCD-based calculations. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：191 / 203

页数：13

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