Measurement of the dipion mass spectrum in X(3872)→J/ψπ+π- decays

被引：116

作者：

Abulencia, A ^{[1
]}

Acosta, D

Adelman, J

Affolder, T

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

Ashmanskas, W

Attal, A

Azfar, F

Azzi-Bacchetta, P

Azzurri, P

Bacchetta, N

Bachacou, H

Badgett, W

Barbaro-Galtieri, A

Barnes, VE

Barnett, BA

Baroiant, S

Bartsch, V

Bauer, G

Bedeschi, F

Behari, S

Belforte, S

Bellettini, G

Bellinger, J

Belloni, A

Ben Haim, E

Benjamin, D

Beretvas, A

Beringer, J

Berry, T

Bhatti, A

Binkley, M

Bisello, D

Bishai, M

Blair, RE

Blocker, C

Bloom, K

机构：

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

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

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

[4] Baylor Univ, Waco, TX 76798 USA

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

[6] Brandeis Univ, Waltham, MA 02254 USA

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

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

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

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

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

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

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

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

[15] Duke Univ, Durham, NC 27708 USA

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

[17] Univ Florida, Gainesville, FL 32611 USA

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

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

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

[21] Harvard Univ, Cambridge, MA 02138 USA

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

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

[24] Univ Illinois, Urbana, IL 61801 USA

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

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

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

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

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

[30] Sungkyunkwan Univ, Suwon 440746, South Korea

[31] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

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

[33] UCL, London WC1E 6BT, England

[34] MIT, Cambridge, MA 02139 USA

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

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

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

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

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

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

[41] Northwestern Univ, Evanston, IL 60208 USA

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

[43] Okayama Univ, Okayama 7008530, Japan

[44] Osaka City Univ, Osaka 588, Japan

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

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

[47] Univ Paris 06, LPNHE, IN2P3, CNRS, F-75252 Paris 05, France

[48] Univ Penn, Philadelphia, PA 19104 USA

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

[50] Univ Siena, Siena, Italy

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 10期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevLett.96.102002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measure the dipion mass spectrum in X(3872) -> J/psi pi(+)pi(-) decays using 360 pb(-1) of (p) over barp collisions at root s = 1.96 TeV collected with the CDF II detector. The spectrum is fit with predictions for odd C-parity (S-3(1), P-1(1), and D-3(J)) charmonia decaying to J/psi pi(+)pi(-), as well as even C-parity states in which the pions are from rho(0) decay. The latter case also encompasses exotic interpretations, such as a D-0(D) over bar*(0) molecule. Only the S-3(1) and J/psi rho hypotheses are compatible with our data. Since S-3(1) is untenable on other grounds, decay via J/psi rho is favored, which implies C = +1 for the X(3872). Models for different J/psi-rho angular momenta L are considered. Flexibility in the models, especially the introduction of rho-omega interference, enables good descriptions of our data for both L = 0 and 1.

引用

页码：1 / 7

页数：7

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