First measurement of charged current cross sections at HERA with longitudinally polarised positrons

被引：28

作者：

Aktas, A

Andreev, V

Anthonis, T

Antunovic, B

Aplin, S

Asmone, A

Astvatsatourov, A

Babaev, A

Backovic, S

Bähr, J

Baghdasaryan, A

Baranov, P

Barrelet, E

Bartel, W

Baudrand, S

Baumgartner, S

Becker, J

Beckingham, M

Behnke, O

Behrendt, O

Belousov, A

Berger, C

Berger, N

Bizot, JC

Boenig, MO

Boudry, V

Bracinik, J

Brandt, G

Brisson, V

Bruncko, D

Büsser, FW

Bunyatyan, A

Buschhorn, G

Bystritskaya, L

Campbell, AJ

Cassol-Brunner, F

Cerny, K

Cerny, V

Chekelian, V

Contreras, JG

Coughlan, JA

Cox, BE

Cozzika, G

Cvach, J

Dainton, JB

Dau, WD

Daum, K

de Boer, Y

Delcourt, B

Del Degan, M

机构：

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

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

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

[4] Univ Antwerp, B-2020 Antwerp, Belgium

[5] Interuniv Inst High Energies, ULB, VUB, Antwerp, Belgium

[6] Rutherford Appleton Lab, Didcot, Oxon, England

[7] Inst Nucl Phys, Krakow, Poland

[8] Univ Dortmund, Inst Phys, Dortmund, Germany

[9] Joint Nucl Res Inst, Dubna, Russia

[10] CE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, France

[11] DESY, D-2000 Hamburg, Germany

[12] Univ Hamburg, Inst Expt Phys, Hamburg, Germany

[13] Heidelberg Univ, Inst Phys, Heidelberg, Germany

[14] Heidelberg Univ, Kirchhoff Inst Phys, Heidelberg, Germany

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

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

[17] Univ Lancaster, Dept Phys, Lancaster, England

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

[19] Queen Mary Univ London, London E1 4NS, England

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

[21] Univ Manchester, Dept Phys, Manchester, Lancs, England

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

[23] CINVESTAV, Dept Fis Aplicada, Merida, Yucatan, Mexico

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

[25] Lebedev Phys Inst, Moscow, Russia

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

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

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

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

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

[31] Univ Montenegro, Fac Sci, Podogorica, Serbia Monteneg

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

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

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

[35] Ist Nazl Fis Nucl, Rome, Italy

[36] Inst Nucl Energy Res, Sofia, Bulgaria

[37] Paul Scherrer Inst, Villigen, Switzerland

[38] Univ Gesamthsch Wuppertal, Fachbereich C, D-5600 Wuppertal, Germany

[39] Yerevan Phys Inst, Yerevan 375036, Armenia

[40] DESY, Zeuthen, Germany

[41] ETH, Inst Teilchenphys, Zurich, Switzerland

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

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

[44] Univ Gesamthsch Wuppertal, Rechenzentrum, D-5600 Wuppertal, Germany

[45] Safarik Univ, Kosice, Slovakia

[46] CERN, Geneva, Switzerland

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

[48] Comenius Univ, Bratislava, Slovakia

[49] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

来源：

PHYSICS LETTERS B | 2006年 / 634卷 / 2-3期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1016/j.physletb.2006.01.054

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Data taken with positrons of different longitudinal polarisation states in collision with unpolarised protons at HERA are used to measure the total cross sections of the charged current process, e(+) p -> nu X, for negative four-momentum transfer squared Q(2) > 400 GeV2 and inelasticity gamma < 0.9. Together with the corresponding cross section obtained from the previously published unpolarised data, the polarisation dependence of the charged current cross section is measured for the first time at high Q(2) and found to be in agreement with the Standard Model prediction. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：173 / 179

页数：7

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