Time-integrated luminosity recorded by the BABAR detector at the PEP-II e+e- collider

被引:101
|
作者
Lees, J. P. [1 ]
Poireau, V. [1 ]
Tisserand, V. [1 ]
Grauges, E. [2 ]
Palano, A. [3 ,4 ,32 ]
Eigen, G. [5 ]
Stugu, B. [5 ]
Brown, D. N. [6 ,7 ,43 ]
Kerth, Lt. [6 ,7 ]
Kolomensky, Yu. G. [6 ,7 ]
Lynch, G. [6 ,7 ]
Koch, H. [8 ]
Schroeder, T. [8 ]
Asgeirsson, D. J. [9 ]
Hearty, C. [9 ]
Mattison, T. S. [9 ]
McKenna, J. A. [9 ]
So, R. Y. [9 ]
Khan, A. [10 ]
Blinov, V. E. [11 ]
Buzykaev, A. R. [11 ]
Druzhinin, V. P. [11 ]
Golubev, V. B. [11 ]
Kravchenko, E. A. [11 ]
Onuchin, A. P. [11 ]
Serednyakov, S. I. [11 ]
Skoypen, Yu. I. [11 ]
Solodov, E. P. [11 ]
Todyshev, K. Yu. [11 ]
Yushkov, A. N. [11 ]
Kirkby, D. [12 ]
Lankford, At [12 ]
Mandelkern, M. [12 ]
Dey, B. [13 ]
Gary, J. W. [13 ]
Long, O. [13 ]
Vitug, G. M. [13 ]
Campagnari, C. [14 ]
Franco Sevilla, M. [14 ]
Hong, T. M. [14 ]
Kovalskyi, D. [14 ]
Richman, J. D. [14 ]
West, C. A. [14 ]
Eisner, A. M. [15 ]
Lockman, W. S. [15 ]
Martinez, A. J. [15 ]
Schumm, B. A. [15 ]
Seiden, A. [15 ]
Chao, D. S. [16 ]
Cheng, C. H. [16 ]
机构
[1] Univ Savoie, CNRS IN2P3, LAPP, F-74941 A Le Vieux, France
[2] Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain
[3] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy
[4] Univ Bari, Dipartimento Fis, I-70126 Bari, Italy
[5] Univ Bergen, Inst Phys, N-5007 Bergen, Norway
[6] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[7] Univ Calif Berkeley, Berkeley, CA 94720 USA
[8] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany
[9] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada
[10] Brunel Univ, Uxbridge UB8 3PH, Middx, England
[11] Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia
[12] Univ Calif Irvine, Irvine, CA 92697 USA
[13] Univ Calif Riverside, Riverside, CA 92521 USA
[14] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA
[15] Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA
[16] CALTECH, Pasadena, CA 91125 USA
[17] Univ Cincinnati, Cincinnati, OH 45221 USA
[18] Univ Colorado, Boulder, CO 80309 USA
[19] Colorado State Univ, Ft Collins, CO 80523 USA
[20] Tech Univ Dortmund, Fak Phys, D-44221 Dortmund, Germany
[21] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany
[22] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France
[23] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland
[24] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy
[25] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy
[26] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[27] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy
[28] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy
[29] Indian Inst Technol Guwahati, Gauhati 781039, Assam, India
[30] Harvard Univ, Cambridge, MA 02138 USA
[31] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany
[32] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany
[33] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England
[34] Univ Iowa, Iowa City, IA 52242 USA
[35] Iowa State Univ, Ames, IA 50011 USA
[36] Johns Hopkins Univ, Baltimore, MD 21218 USA
[37] IN2P3 CNRS, Lab Accelerateur Lineaire, F-91898 Orsay, France
[38] Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France
[39] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[40] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England
[41] Univ London, London E1 4NS, England
[42] Univ London, Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England
[43] Univ Louisville, Louisville, KY 40292 USA
[44] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany
[45] Univ Manchester, Manchester M13 9PL, Lancs, England
[46] Univ Maryland, College Pk, MD 20742 USA
[47] Univ Massachusetts, Amherst, MA 01003 USA
[48] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA
[49] McGill Univ, Montreal, PQ H3A 2T8, Canada
[50] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy
基金
加拿大自然科学与工程研究理事会; 美国国家科学基金会; 英国科学技术设施理事会;
关键词
BABAR; Integrated luminosity; Electron-positron collider; PEP-II; PARTON SHOWER; MONTE-CARLO; ANNIHILATION;
D O I
10.1016/j.nima.2013.04.029
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
We describe a measurement of the time-integrated luminosity of the data collected by the BABAR experiment at the PEP-II asymmetric-energy e(+)e(-) collider at the Upsilon(4S), Upsilon(3S), and Upsilon(2S) resonances and in a continuum region below each resonance. We measure the time-integrated luminosity by counting e(+)e(-)-> e(+)e(-) and (for the Upsilon(4S) only) e(+)e(-)->mu(+)mu(-) candidate events, allowing additional photons in the final state. We use data-corrected simulation to determine the cross-sections and reconstruction efficiencies for these processes, as well as the major backgrounds. Due to the large cross-sections of e(+)e(-)-> e(+)e(-) and e(+)e(-)->mu(+)mu(-), the statistical uncertainties of the measurement are substantially smaller than the systematic uncertainties. The dominant systematic uncertainties are due to observed differences between data and simulation, as well as uncertainties on the cross-sections. For data collected on the Upsilon(3S) and Upsilon(2S) resonances, an additional uncertainty arises due to Upsilon -> e(+)e(-)X background. For data collected off the Upsilon resonances, we estimate an additional uncertainty due to time dependent efficiency variations, which can affect the short off-resonance runs. The relative uncertainties on the luminosities of the on-resonance (off-resonance) samples are 0.43% (0.43%) for the Upsilon(4S), 0.58% (0.72%) for the Upsilon(3S), and 0.68% (0.88%) for the Upsilon(2S). (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:203 / 213
页数:11
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