Evidence for a narrow anti-charmed baryon state

被引：170

作者：

Aktas, A

Andreev, V

Anthonis, T

Asmone, A

Babaev, A

Backovic, S

Bähr, J

Baranov, P

Barrelet, E

Bartel, W

Baumgartner, S

Becker, J

Beckingham, M

Behnke, O

Behrendt, O

Belousov, A

Berger, C

Berger, N

Berndt, T

Bizot, JC

Böhme, J

Boenig, MO

Boudry, V

Bracinik, J

Brisson, V

Bröker, HB

Brown, DP

Bruncko, D

Büsser, FW

Bunyatyan, A

Buschhorn, G

Bystritskaya, L

Campbell, AJ

Caron, S

Cassol-Brunner, F

Cerny, K

Chekelian, V

Collard, C

Contreras, JG

Coppens, YR

Coughlan, JA

Cox, BE

Cozzika, G

Cvach, J

Dainton, JB

Dau, WD

Daum, K

Delcourt, B

Demirchyan, R

De Roeck, A

机构：

[1] Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany

[2] Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, Germany

[3] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England

[4] ULB, VUB, Inter Univ Inst High Energies, Brussels, Belgium

[5] Univ Antwerp, B-2020 Antwerp, Belgium

[6] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[7] Inst Nucl Phys, Krakow, Poland

[8] Univ Dortmund, Inst Phys, D-4600 Dortmund, Germany

[9] Joint Inst Nucl Res, Dubna, Russia

[10] CE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, France

[11] DESY, D-2000 Hamburg, Germany

[12] Univ Hamburg, Inst Expt Phys, Hamburg, Germany

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

[14] Heidelberg Univ, Inst Phys, D-6900 Heidelberg, Germany

[15] Heidelberg Univ, Kirchhoff Inst Phys, Heidelberg, Germany

[16] Univ Kiel, Inst Expt & Angew Phys, Kiel, Germany

[17] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia

[18] Univ Lancaster, Dept Phys, Lancaster, England

[19] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[20] Queen Mary Univ London, London E1 4NS, England

[21] Lund Univ, Dept Phys, Lund, Sweden

[22] Univ Manchester, Dept Phys, Manchester M13 9PL, Lancs, England

[23] Univ Mediterranee, CPPM, CNRS, IN2P3, Marseille, France

[24] CINVESTAV, Dept Fis Aplicada, Merida, Yucatan, Mexico

[25] CINVESTAV, Dept Fis, Mexico City 14000, DF, Mexico

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

[27] PN Lebedev Phys Inst, Moscow 117924, Russia

[28] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[29] Univ Paris 11, LAL, CNRS, IN2P3, Orsay, France

[30] Ecole Polytech, CNRS, IN2P3, LLR, F-91128 Palaiseau, France

[31] Univ Paris 06, LPNHE, Paris, France

[32] Univ Paris 07, LPNHE, Paris, France

[33] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic

[34] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic

[35] Univ Roma Tre, Dipartimento Fis, Rome, Italy

[36] INFN Roma 3, Rome, Italy

[37] Paul Scherrer Inst, Villigen, Switzerland

[38] Berg Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany

[39] Yerevan Phys Inst, Yerevan 375036, Armenia

[40] DESY, Zeuthen, Germany

[41] ETH, Inst Teilchenphys, Zurich, Switzerland

[42] Univ Zurich, Inst Phys, Zurich, Switzerland

[43] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece

[44] Berg Univ Wuppertal, Rechenzentrum, Wuppertal, Germany

[45] Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany

[46] Safarik Univ, Kosice, Slovakia

[47] CERN, Geneva, Switzerland

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

来源：

PHYSICS LETTERS B | 2004年 / 588卷 / 1-2期

关键词：

D O I：

10.1016/j.physletb.2004.03.012

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A narrow resonance in D*(-)p and D*(+)(p) over bar invariant mass combinations is observed in inelastic electron-proton collisions at centre-of-mass energies of 300 GeV and 320 GeV at HERA. The resonance has a mass of 3099 +/- 3(stat.) +/- 5(syst.) MeV and a measured Gaussian width of 12 +/- 3(stat.) MeV, compatible with the experimental resolution. The resonance is interpreted as an anti-charmed baryon with a minimal constituent quark composition of uudd (c) over bar, together with the charge conjugate. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：17 / 28

页数：12

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