Evidence for a Narrow Near-Threshold Structure in the J/ψφ Mass Spectrum in B+ → J/ψφK+ Decays

被引：266

作者：

Aaltonen, T. ^{[1
,68
]}

Adelman, J. ^{[15
]}

Akimoto, T. ^{[60
]}

Alvarez Gonzalez, B. ^{[13
]}

Amerio, S. ^{[42
,43
]}

Amidei, D. ^{[34
]}

Anastassov, A. ^{[38
]}

Annovi, A. ^{[21
]}

Antos, J. ^{[16
,67
]}

Apollinari, G. ^{[19
]}

Apresyan, A. ^{[51
]}

Arisawa, T. ^{[62
]}

Artikov, A. ^{[17
]}

Ashmanskas, W. ^{[19
]}

Attal, A. ^{[4
]}

Aurisano, A. ^{[57
]}

Azfar, F. ^{[4
,77
]}

Badgett, W. ^{[19
]}

Barbaro-Galtieri, A. ^{[29
]}

Barnes, V. E. ^{[51
]}

Barnett, B. A. ^{[26
]}

Barria, P. ^{[46
,48
]}

Bartsch, V. ^{[3
,73
]}

Bauer, G. ^{[32
]}

Beauchemin, P. -H. ^{[33
,74
,75
,76
]}

Bedeschi, F. ^{[46
]}

Beecher, D. ^{[3
,73
]}

Behari, S. ^{[26
]}

Bellettini, G. ^{[46
,47
]}

Bellinger, J. ^{[64
]}

Benjamin, D. ^{[18
]}

Beretvas, A. ^{[19
]}

Beringer, J. ^{[29
]}

Bhatti, A. ^{[53
]}

Binkley, M. ^{[19
]}

Bisello, D. ^{[42
,43
]}

Bizjak, I. ^{[3
]}

Blair, R. E. ^{[2
]}

Blocker, C. ^{[8
]}

Blumenfeld, B. ^{[26
]}

Bocci, A. ^{[18
]}

Bodek, A. ^{[52
]}

Boisvert, V. ^{[52
]}

Bolla, G. ^{[51
]}

Bortoletto, D. ^{[51
]}

Boudreau, J. ^{[50
]}

Boveia, A. ^{[12
]}

Brau, B. ^{[12
]}

Bridgeman, A. ^{[25
]}

Brigliadori, L. ^{[6
,7
]}

机构：

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

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

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

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

[5] Baylor Univ, Waco, TX 76798 USA

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

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

[8] Brandeis Univ, Waltham, MA 02254 USA

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

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

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

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

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

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

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

[16] Comenius Univ, Bratislava 84248, Slovakia

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

[18] Duke Univ, Durham, NC 27708 USA

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

[20] Univ Florida, Gainesville, FL 32611 USA

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

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

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

[24] Harvard Univ, Cambridge, MA 02138 USA

[25] Univ Illinois, Urbana, IL 61801 USA

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

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

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

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

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

[31] Ctr Invest Energet Medioambient & Tecnol, E-28040 Madrid, Spain

[32] MIT, Cambridge, MA 02139 USA

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

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

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

[36] Inst Theoret & Expt Phys, ITEP, Moscow 117259, Russia

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

[38] Northwestern Univ, Evanston, IL 60208 USA

[39] Ohio State Univ, Columbus, OH 43210 USA

[40] Okayama Univ, Okayama 7008530, Japan

[41] Osaka City Univ, Osaka 588, Japan

[42] Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy

[43] Univ Padua, I-35131 Padua, Italy

[44] Univ Paris 06, CNRS, LPNHE, IN2P3,UMR7585, F-75252 Paris, France

[45] Univ Penn, Philadelphia, PA 19104 USA

[46] Ist Nazl Fis Nucl Pisa, I-56127 Pisa, Italy

[47] Univ Pisa, I-56127 Pisa, Italy

[48] Univ Siena, I-56127 Pisa, Italy

[49] Scuola Normale Super Pisa, I-56100 Pisa, Italy

[50] Univ Pittsburgh, Pittsburgh, PA 15260 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 24期

基金：

新加坡国家研究基金会;

关键词：

MESONS; QCD;

D O I：

10.1103/PhysRevLett.102.242002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Evidence is reported for a narrow structure near the J/psi phi threshold in exclusive B+ -> J/psi phi K+ decays produced in (p) over barp collisions at root s = 1.96 TeV. A signal of 14 +/- 5 events, with statistical significance in excess of 3.8 standard deviations, is observed in a data sample corresponding to an integrated luminosity of 2.7 fb(-1), collected by the CDF II detector. The mass and natural width of the structure are measured to be 4143.0 +/- 2.9(stat) +/- 1.2(syst) MeV/c(2) and 11.7(-5.0)(+8.3)(stat) +/- 3.7(stat) Mev/c(2).

引用

页数：7

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