Precision Measurement of the X(3872) Mass in J/ψπ+π- Decays

被引：98

作者：

Aaltonen, T. ^{[1
,2
]}

Adelman, J. ^{[17
]}

Akimoto, T. ^{[73
]}

Alvarez Gonzalez, B. ^{[15
]}

Amerio, S. ^{[55
,56
]}

Amidei, D. ^{[46
]}

Anastassov, A. ^{[50
]}

Annovi, A. ^{[24
]}

Antos, J. ^{[22
]}

Apollinari, G. ^{[22
]}

Apresyan, A. ^{[64
]}

Arisawa, T. ^{[75
]}

Artikov, A. ^{[20
]}

Ashmanskas, W. ^{[22
]}

Attal, A. ^{[6
]}

Aurisano, A. ^{[70
]}

Azfar, F. ^{[54
]}

Badgett, W. ^{[22
]}

Barbaro-Galtieri, A. ^{[37
]}

Barnes, V. E. ^{[64
]}

Barnett, B. A. ^{[29
]}

Barria, P. ^{[59
,61
]}

Bartos, P. ^{[18
,19
]}

Bartsch, V. ^{[39
]}

Bauer, G. ^{[41
]}

Beauchemin, P. -H. ^{[42
,43
,44
,45
]}

Bedeschi, F. ^{[59
]}

Beecher, D. ^{[39
]}

Behari, S. ^{[29
]}

Bellettini, G. ^{[59
,60
]}

Bellinger, J. ^{[77
]}

Benjamin, D. ^{[21
]}

Beretvas, A. ^{[22
]}

Beringer, J. ^{[37
]}

Bhatti, A. ^{[66
]}

Binkley, M. ^{[22
]}

Bisello, D. ^{[55
,56
]}

Bizjak, I. ^{[39
]}

Blair, R. E. ^{[4
]}

Blocker, C. ^{[10
]}

Blumenfeld, B. ^{[29
]}

Bocci, A. ^{[21
]}

Bodek, A. ^{[65
]}

Boisvert, V. ^{[65
]}

Bolla, G. ^{[64
]}

Bortoletto, D. ^{[64
]}

Boudreau, J. ^{[63
]}

Boveia, A. ^{[14
]}

Brau, B. ^{[14
]}

Bridgeman, A. ^{[28
]}

机构：

[1] Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland

[2] Helsinki Inst Phys, FIN-00014 Helsinki, Finland

[3] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[4] Argonne Natl Lab, Argonne, IL 60439 USA

[5] Univ Athens, GR-15771 Athens, Greece

[6] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain

[7] Baylor Univ, Waco, TX 76798 USA

[8] Ist Nazl Fis Nucl, I-40127 Bologna, Italy

[9] Univ Bologna, I-40127 Bologna, Italy

[10] Brandeis Univ, Waltham, MA 02254 USA

[11] Univ Calif Davis, Davis, CA 95616 USA

[12] Univ Calif Los Angeles, Los Angeles, CA 90024 USA

[13] Univ Calif San Diego, La Jolla, CA 92093 USA

[14] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

[15] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain

[16] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[17] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[18] Comenius Univ, Bratislava 84248, Slovakia

[19] Inst Expt Phys, Kosice 04001, Slovakia

[20] Joint Inst Nucl Res, RU-141980 Dubna, Russia

[21] Duke Univ, Durham, NC 27708 USA

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

[23] Univ Florida, Gainesville, FL 32611 USA

[24] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[25] Univ Geneva, CH-1211 Geneva 4, Switzerland

[26] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

[27] Harvard Univ, Cambridge, MA 02138 USA

[28] Univ Illinois, Urbana, IL 61801 USA

[29] Johns Hopkins Univ, Baltimore, MD 21218 USA

[30] Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany

[31] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea

[32] Seoul Natl Univ, Seoul 151742, South Korea

[33] Sungkyunkwan Univ, Suwon 440746, South Korea

[34] Korea Inst Sci & Technol Informat, Taejon 305806, South Korea

[35] Chonnam Natl Univ, Kwangju 500757, South Korea

[36] Chonbuk Natl Univ, Jeonju 561756, South Korea

[37] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[38] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England

[39] UCL, London WC1E 6BT, England

[40] CIEMAT, E-28040 Madrid, Spain

[41] MIT, Cambridge, MA 02139 USA

[42] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada

[43] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada

[44] Univ Toronto, Toronto, ON M5S 1A7, Canada

[45] TRIUMF, Vancouver, BC V6T 2A3, Canada

[46] Univ Michigan, Ann Arbor, MI 48109 USA

[47] Michigan State Univ, E Lansing, MI 48824 USA

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

[49] Univ New Mexico, Albuquerque, NM 87131 USA

[50] Northwestern Univ, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 15期

基金：

美国国家科学基金会;

关键词：

DETECTOR;

D O I：

10.1103/PhysRevLett.103.152001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present an analysis of the mass of the X(3872) reconstructed via its decay to J/psi pi(+)pi(-) using 2.4 fb(-1) of integrated luminosity from p (p) over bar collisions at root s = 1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. The possible existence of two nearby mass states is investigated. Within the limits of our experimental resolution the data are consistent with a single state, and having no evidence for two states we set upper limits on the mass difference between two hypothetical states for different assumed ratios of contributions to the observed peak. For equal contributions, the 95% confidence level upper limit on the mass difference is 3.6 MeV/c(2). Under the single-state model the X(3872) mass is measured to be 3871.61 +/- 0.16(stat) +/- 0.19(syst) MeV/c(2), which is the most precise determination to date.

引用

页数：8

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