Observation of a narrow charm-strange meson DsJ+(2632)→Ds+η and D0K+ -: art. no. 242001

被引：90

作者：

Evdokimov, AV ^{[1
]}

Akgun, U

Alkhazov, G

Amaro-Reyes, J

Atamantchouk, AG

Ayan, AS

Balatz, MY

Bondar, NF

Cooper, PS

Dauwe, LJ

Davidenko, GV

Dersch, U

Dolgolenko, AG

Dzyubenko, GB

Edelstein, R

Emediato, L

Endler, AMF

Engelfried, J

Eschrich, I

Escobar, CO

Filimonov, IS

Garcia, FG

Gaspero, M

Giller, I

Golovtsov, VL

Gouffon, P

Gülmez, E

Kangling, H

Iori, M

Jun, SY

Kaya, M

Kilmer, J

Kim, VT

Kochenda, LM

Konorov, I

Kozhevnikov, AP

Krivshich, AG

Krüger, H

Kubantsev, MA

Kubarovsky, VP

Kulyavtsev, AI

Kuropatkin, NP

Kurshetsov, VF

Kushnirenko, A

Kwan, S

Lach, J

Lamberto, A

Landsberg, LG

Larin, I

Leikin, EM

机构：

[1] Inst Theoret & Expt Phys, Moscow, Russia

[2] Bogazici Univ, TR-80815 Bebek, Istanbul, Turkey

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

[4] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

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

[6] Inst High Energy Phys, Protvino, Russia

[7] Inst High Energy Phys, Beijing, Peoples R China

[8] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[9] Moscow MV Lomonosov State Univ, Moscow, Russia

[10] Petersburg Nucl Phys Inst, St Petersburg, Russia

[11] Tel Aviv Univ, IL-69978 Tel Aviv, Israel

[12] Univ Autonoma San Luis Potosi, San Luis Potosi, Mexico

[13] Univ Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, Brazil

[14] Univ Bristol, Bristol BS8 1TL, Avon, England

[15] Univ Iowa, Iowa City, IA 52242 USA

[16] Univ Michigan Flint, Flint, MI 48502 USA

[17] Univ Roma La Sapienza, Rome, Italy

[18] Ist Nazl Fis Nucl, Rome, Italy

[19] Univ Sao Paulo, Sao Paulo, Brazil

[20] Univ Trieste, I-34127 Trieste, Italy

[21] Ist Nazl Fis Nucl, Trieste, Italy

[22] Ball State Univ, Muncie, IN 47306 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 24期

基金：

以色列科学基金会; 巴西圣保罗研究基金会; 美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.242001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first observation of a charm-strange meson D-sJ(+)(2632) at a mass of 2632.5+/-1.7 MeV/c(2) in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, D(s)(+)eta and (DK+)-K-0. In the D(s)(+)eta decay mode we observe a peak with 101 events over a combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c(2). There is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0 MeV/c(2) in the decay mode (DK+)-K-0. The decay width of this state is <17 MeV/c(2) at 90% confidence level. The relative branching ratio Gamma((DK+)-K-0)/Gamma(D(s)(+)eta) is 0.14+/-0.06. The mechanism that keeps this state narrow is unclear. Its decay pattern is also unusual, being dominated by the D(s)(+)eta decay mode.

引用

页数：5

共 21 条

[1] Observation of a narrow meson state decaying to Ds+π0 at a mass of 2.32 GeV/c2 -: art. no. 242001 [J].

Aubert, B ;

Barate, R ;

Boutigny, D ;

Gaillard, JM ;

Hicheur, A ;

Karyotakis, Y ;

Lees, JP ;

Robbe, P ;

Tisserand, V ;

Zghiche, A ;

Palano, A ;

Pompili, A ;

Chen, JC ;

Qi, ND ;

Rong, G ;

Wang, P ;

Zhu, YS ;

Eigen, G ;

Ofte, I ;

Stugu, B ;

Abrams, GS ;

Borgland, AW ;

Breon, AB ;

Brown, DN ;

Button-Shafer, J ;

Cahn, RN ;

Charles, E ;

Day, CT ;

Gill, MS ;

Gritsan, AV ;

Groysman, Y ;

Jacobsen, RG ;

Kadel, RW ;

Kadyk, J ;

Kerth, LT ;

Kolomensky, YG ;

Kral, JF ;

Kukartsev, G ;

LeClerc, C ;

Levi, ME ;

Lynch, G ;

Mir, LM ;

Oddone, PJ ;

Orimoto, TJ ;

Pripstein, M ;

Roe, NA ;

Romosan, A ;

Ronan, MT ;

Shelkov, VG ;

Telnov, AV .

PHYSICAL REVIEW LETTERS, 2003, 90 (24) :242001/1-242001/7

[2]

AUBERT B, HEPEX0408087

[3]

BALATZ M, 2004, UNPUB LEAD GLASS CAR

[4]

Bardeen W.A., COMMUNICATION

[5] Chiral multiplets of heavy-light mesons [J].

Bardeen, WA ;

Eichten, EJ ;

Hill, CT .

PHYSICAL REVIEW D, 2003, 68 (05)

[6] CHIRAL DYNAMICS AND HEAVY-QUARK SYMMETRY IN A SOLVABLE TOY FIELD-THEORETIC MODEL [J].

BARDEEN, WA ;

HILL, CT .

PHYSICAL REVIEW D, 1994, 49 (01) :409-425

[7] Observation of a narrow resonance of mass 2.46 GeV/c2 decaying to Ds*+π0 and confirmation of the DsJ*(2317) state -: art. no. 032002 [J].

Besson, D ;

Anderson, S ;

Frolov, VV ;

Gong, DT ;

Kubota, Y ;

Li, SZ ;

Poling, R ;

Smith, A ;

Stepaniak, CJ ;

Urheim, J ;

Metreveli, Z ;

Seth, KK ;

Tomaradze, A ;

Zweber, P ;

Arms, K ;

Eckhart, E ;

Gan, KK ;

Gwon, C ;

Pedlar, TK ;

von Toerne, E ;

Severini, H ;

Skubic, P ;

Dytman, SA ;

Mueller, JA ;

Nam, S ;

Savinov, V ;

Hinson, JW ;

Huang, GS ;

Lee, J ;

Miller, DH ;

Pavlunin, V ;

Sanghi, B ;

Shibata, EI ;

Shipsey, IPJ ;

Cronin-Hennessy, D ;

Park, CS ;

Park, W ;

Thayer, JB ;

Thorndike, EH ;

Coan, TE ;

Gao, YS ;

Liu, F ;

Stroynowski, R ;

Artuso, M ;

Boulahouache, C ;

Blusk, S ;

Dambasuren, E ;

Dorjkhaidav, O ;

Mountain, R ;

Muramatsu, H .

PHYSICAL REVIEW D, 2003, 68 (03)

[8]

CRONINHENNESSY D, COMMUNICATION

[9] Excited heavy-light systems and hadronic transitions [J].

Di Pierro, M ;

Eichten, E .

PHYSICAL REVIEW D, 2001, 64 (11)

[10] The RICH detector of the SELEX experiment [J].

Engelfried, J ;

Filimonov, I ;

Kilmer, J ;

Kozhevnikov, A ;

Kubarovsky, V ;

Molchanov, V ;

Nemitkin, A ;

Ramberg, E ;

Rud, V ;

Stutte, L .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1999, 433 (1-2) :149-152

← 1 2 3 →