Observation of the narrow state X(3872)→J/ψπ+π- in (p)over-barp collisions at √s=1.96 TeV -: art. no. 072001

被引：649

作者：

Acosta, D ^{[1
]}

Affolder, T

Ahn, MH

Akimoto, T

Albrow, MG

Ambrose, D

Amerio, S

Amidei, D

Anastassov, A

Anikeev, K

Annovi, A

Antos, J

Aoki, M

Apollinari, G

Arguin, JF

Arisawa, T

Artikov, A

Asakawa, T

Ashmanskas, W

Attal, A

Azfar, F

Azzi-Bacchetta, P

Bacchetta, N

Bachacou, H

Badgett, W

Bailey, S

Barbaro-Galtieri, A

Barker, G

Barnes, VE

Barnett, BA

Baroiant, S

Barone, M

Bauer, G

Bedeschi, F

Behari, S

Belforte, S

Bell, WH

Bellettini, G

Bellinger, J

Benjamin, D

Beretvas, A

Bhatti, A

Binkley, M

Bisello, D

Bishai, M

Blair, RE

Blocker, C

Bloom, K

Blumenfeld, B

Bocci, A

机构：

[1] Univ Florida, Gainesville, FL 32611 USA

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

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

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

[5] Brandeis Univ, Waltham, MA 02254 USA

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

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

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

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

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

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

[12] Joint Inst Nucl Res, Dubna 141980, Russia

[13] Duke Univ, Durham, NC 27708 USA

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

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

[16] Univ Geneva, CH-1211 Geneva, Switzerland

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

[18] Harvard Univ, Cambridge, MA 02138 USA

[19] Univ Helsinki, Helsinki Inst Phys, Helsinki Grp, FIN-00014 Helsinki, Finland

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

[21] Hiroshima Univ, Higashihiroshima 724, Japan

[22] Univ Illinois, Urbana, IL 61801 USA

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

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

[25] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 305, Japan

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

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

[28] Sungkyunkwan Univ, Suwon 440746, South Korea

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

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

[31] UCL, London WC1E 6BT, England

[32] MIT, Cambridge, MA 02139 USA

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

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

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

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

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

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

[39] Northwestern Univ, Evanston, IL 60208 USA

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

[41] Okayama Univ, Okayama 7008530, Japan

[42] Osaka City Univ, Osaka 588, Japan

[43] Univ Oxford, Oxford OX1 3RH, England

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

[45] Univ Penn, Philadelphia, PA 19104 USA

[46] Univ Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, Italy

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

[48] Univ Pittsburgh, Pittsburgh, PA 15260 USA

[49] Purdue Univ, W Lafayette, IN 47907 USA

[50] Univ Rochester, Rochester, NY 14627 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 07期

基金：

俄罗斯基础研究基金会; 新加坡国家研究基金会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.072001

中图分类号：

O4 [物理学];

学科分类号：

0702 [物理学];

摘要：

We report the observation of a narrow state decaying into J/psipi(+)pi(-) and produced in 220 pb(-1) of (p) over barp collisions at roots=1.96 TeV in the CDF II experiment. We observe 730+/-90 decays. The mass is measured to be 3871.3+/-0.7(stat)+/-0.4(syst) MeV/c(2), with an observed width consistent with the detector resolution. This is in agreement with the recent observation by the Belle Collaboration of the X(3872) meson.

引用

页码：072001 / 1

页数：6

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