Evidence for an exotic S =-2, Q =-2 baryon resonance in proton-proton collisions at the CERN SPS -: art. no. 042003

被引：344

作者：

Alt, C ^{[1
]}

Anticic, T

Baatar, B

Barna, D

Bartke, J

Betev, L

Bialkowska, H

Billmeier, A

Blume, C

Boimska, B

Botje, M

Bracinik, J

Bramm, R

Brun, R

Buncic, P

Cerny, V

Christakoglou, P

Chvala, O

Cramer, JG

Csató, P

Darmenov, N

Dimitrov, A

Dinkelaker, P

Eckardt, V

Farantatos, G

Filip, P

Flierl, D

Fodor, Z

Foka, P

Freund, P

Friese, V

Gál, J

Gazdzicki, M

Georgopoulos, G

Gladysz, E

Hegyi, S

Höhne, C

Kadija, K

Karev, A

Kniege, S

Kolesnikov, VI

Kollegger, T

Korus, R

Kowalski, M

Kraus, I

Kreps, M

van Leeuwen, M

Lévai, P

Litov, L

Makariev, M

机构：

[1] Goethe Univ Frankfurt, Fachbereich Phys, D-60486 Frankfurt, Germany

[2] NIKHEF, NL-1009 DB Amsterdam, Netherlands

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

[4] Comenius Univ, Bratislava 84215, Slovakia

[5] KFKI Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary

[6] MIT, Cambridge, MA 02139 USA

[7] Inst Nucl Phys, PL-31342 Krakow, Poland

[8] Gesell Schwerionenforsch mbH, D-64220 Darmstadt, Germany

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

[10] CERN, CH-1211 Geneva, Switzerland

[11] Univ Houston, Houston, TX 77204 USA

[12] Jan Kochanowski Univ Humanities & Sci, PL-25406 Kielce, Poland

[13] Univ Marburg, Fachbereich Phys, D-35032 Marburg, Germany

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

[15] Charles Univ Prague, Inst Nucl & Particle Phys, Prague 12116, Czech Republic

[16] Univ Washington, Nucl Phys Lab, Seattle, WA 98195 USA

[17] Sofia Univ St Kliment Ohridski, Dept Atom Phys, Sofia 1784, Bulgaria

[18] Inst Nucl Studies, PL-00681 Warsaw, Poland

[19] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland

[20] Rudjer Boskovic Inst, Zagreb 10000, Croatia

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.92.042003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Results of resonance searches in the Xi(-)pi(-), Xi(-)pi(+), Xi(+)pi(-), and Xi(+)pi(+) invariant mass spectra in proton-proton collisions at roots = 17.2 GeV are presented. Evidence is shown for the existence of a narrow Xi(-)pi(-) baryon resonance with mass of 1.862+/-0.002 GeV/c(2) and width below the detector resolution of about 0.018 GeV/c(2). The significance is estimated to be above 4.2sigma. This state is a candidate for the hypothetical exotic Xi(3/2)(--) baryon with S = -2,I = 3/2 , and a quark content of (dsds(u) over bar). At the same mass, a peak is observed in the Xi(-)pi(+) spectrum which is a candidate for the Xi(3/2)(0) member of this isospin quartet with a quark content of (dsus(d) over bar). The corresponding antibaryon spectra also show enhancements at the same invariant mass.

引用

页数：5

共 21 条

[1] The NA49 large acceptance hadron detector [J].

Afanasiev, S ;

Alber, T ;

Appelshäuser, H ;

Bächler, J ;

Barna, D ;

Barnby, LS ;

Bartke, J ;

Barton, RA ;

Betev, L ;

Bialkowska, H ;

Bieser, F ;

Billmeier, A ;

Blyth, CO ;

Bock, R ;

Bormann, C ;

Bracinik, J ;

Brady, FP ;

Brockmann, R ;

Brun, R ;

Buncic, P ;

Caines, HL ;

Cebra, D ;

Cooper, GE ;

Cramer, JG ;

Csato, P ;

Cyprian, M ;

Dunn, J ;

Eckardt, V ;

Eckhardt, F ;

Empl, T ;

Eschke, J ;

Ferguson, MI ;

Fessler, H ;

Fischer, HG ;

Flierl, D ;

Fodor, Z ;

Frankenfeld, U ;

Foka, P ;

Freund, P ;

Friese, V ;

Ftacnik, J ;

Fuchs, M ;

Gabler, F ;

Gal, J ;

Ganz, R ;

Gazdzicki, M ;

Gladysz, E ;

Grebieszkow, J ;

Günther, J ;

Harris, JW .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1999, 430 (2-3) :210-244

[2] Observation of a baryon resonance with positive strangeness in K+ collisions with Xe nuclei [J].

Barmin, VV ;

Borisov, VS ;

Davidenko, GV ;

Dolgolenko, AG ;

Guaraldo, C ;

Larin, IF ;

Matveev, VA ;

Petrascu, C ;

Shebanov, VA ;

Shishov, NN ;

Sokolov, LI ;

Tumanov, GK .

PHYSICS OF ATOMIC NUCLEI, 2003, 66 (09) :1715-1718

[3]

BARNA D, 2002, THESIS KFKI RES I NU

[4] Evidence for the positive-strangeness pentaquark Θ+ in photoproduction with the SAPHIR detector at ELSA [J].

Barth, J ;

Braun, W ;

Ernst, J ;

Glander, KH ;

Hannappel, J ;

Jöpen, N ;

Kalinowsky, H ;

Klein, F ;

Klempt, E ;

Lawall, R ;

Link, J ;

Menze, D ;

Neuerburg, W ;

Ostrick, M ;

Paul, E ;

van Pee, H ;

Schulday, I ;

Schwille, WJ ;

Wiegers, B ;

Wieland, FW ;

Wisskirchen, J ;

Wu, C .

PHYSICS LETTERS B, 2003, 572 (3-4) :127-132

[5] SKYRME MODEL OF BARYON OCTET AND DECUPLET [J].

CHEMTOB, M .

NUCLEAR PHYSICS B, 1985, 256 (04) :600-608

[6] Exotic anti-decuplet of baryons: prediction from chiral solitons [J].

Diakonov, D ;

Petrov, V ;

Polyakov, M .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1997, 359 (03) :305-314

[7] Review of particle physics -: art. no. 010001 [J].

Hagiwara, K ;

Hikasa, K ;

Nakamura, K ;

Tanabashi, M ;

Aguilar-Benitez, M ;

Amsler, C ;

Barnett, RM ;

Burchat, PR ;

Carone, CD ;

Caso, C ;

Conforto, G ;

Dahl, O ;

Doser, M ;

Eidelman, S ;

Feng, JL ;

Gibbons, L ;

Goodman, M ;

Grab, C ;

Groom, DE ;

Gurtu, A ;

Hayes, KG ;

Hernández-Rey, JJ ;

Honscheid, K ;

Kolda, C ;

Mangano, ML ;

Manley, DM ;

Manohar, AV ;

March-Russell, J ;

Masoni, A ;

Miquel, R ;

Monig, K ;

Murayama, H ;

Navas, S ;

Olive, KA ;

Pape, L ;

Patrignani, C ;

Piepke, A ;

Roos, M ;

Terning, J ;

Tornqvist, NA ;

Trippe, TG ;

Vogel, P ;

Wohl, CG ;

Workman, RL ;

Yao, WM ;

Armstrong, B ;

Gee, PS ;

Lugovsky, KS ;

Lugovsky, SB ;

Lugovsky, VS .

PHYSICAL REVIEW D, 2002, 66 (01)

[8] SYSTEMATICS OF POSSIBLY NARROW QUARK STATES WITH BARYON NUMBER ONE [J].

HOGAASEN, H ;

SORBA, P .

NUCLEAR PHYSICS B, 1978, 145 (01) :119-140

[9] Diquarks and exotic spectroscopy [J].

Jaffe, R ;

Wilczek, F .

PHYSICAL REVIEW LETTERS, 2003, 91 (23)

[10]

JAFFE RL, 1976, P TOP C BAR RES OXF

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