Pentaquarks uudds with One Color Sextet Diquark

[en] The masses of pentaquarks uudds¯ are calculated within the framework of a semirelativistic effective QCD Hamiltonian using a diquark picture. This approximation allows a correct treatment of the confinement, assumed here to be similar to a Y junction. With only color antitriplet diquarks, the mass of the pentaquark candidate Theta with positive parity is found around 2.2 GeV. It is shown that, if a color sextet diquark is present, the lowest uudds¯ pentaquark is characterized by a much smaller mass with a negative parity. A mass below 1.7 GeV is computed if the masses of the color antitriplet and color sextet diquarks are taken similar.

Disciplines :

Physics

Author, co-author :

Semay, Claude

Brau, Fabian

Silvestre-Brac, B.

Language :

English

Title :

Pentaquarks uudds with One Color Sextet Diquark

Publication date :

18 February 2005

Journal title :

Physical Review Letters

ISSN :

0031-9007

Publisher :

American Physical Society, New York, United States - New York

Volume :

Issue :

Issue 6

Pages :

062001 (4 p.)

Peer reviewed :

Peer Reviewed verified by ORBi

Research unit :

S824 - Physique nucléaire et subnucléaire
S885 - Laboratoire Interfaces et Fluides complexes

Research institute :

R150 - Institut de Recherche sur les Systèmes Complexes

Available on ORBi UMONS :

since 10 June 2010

Statistics

Number of views

1 (0 by UMONS)

Number of downloads

0 (0 by UMONS)

More statistics

Scopus citations^®

Scopus citations^®
without self-citations

OpenCitations

Bibliography

LEPS Collaboration, T. Nakano et al., Phys. Rev. Lett. 91, 012002 (2003).
W. Lorenzon, hep-ex/0411027; see Refs. [7-17] therein.
D. Diakonov, V. Petrov, and M.V. Polyakov, Z. Phys. A 359, 305 (1997).
F. Stancu, Phys. Lett. B 595, 269 (2004).
R. L. Jaffe and F. Wilczek, Phys. Rev. Lett. 91, 232003 (2003).
E. V. Shuryak and I. Zahed, Phys. Lett. B 589, 21 (2004).
N. I. Kochelev, H.-J. Lee, and V. Vento, Phys. Lett. B 594, 87 (2004).
I. M. Narodetskii, Yu. A. Simonov, M. A. Trusov, and A. I. Veselov, Phys. Lett. B 578, 318 (2004).
I. M. Narodetskii et al., "Pentaquarks: Facts and Puzzles" (to be published).
C. Semay and B. Silvestre-Brac, Eur. Phys. J. A 22, 1 (2004).
S. Fleck, B. Silvestre-Brac, and J.M. Richard, Phys. Rev. D 38, 1519 (1988).
L. Ya. Glozman et al., Phys. Rev. C 57, 3406 (1998).
N.I. Kochelev, Yad. Fiz. 41, 456 (1985) [Sov. J. Nucl. Phys. 41, 291 (1985)].
N.I. Kochelev, Yad. Fiz. 41, 456 (1985) [Sov. J. Nucl. Phys. 41, 291 (1985)].
M.W. Beinker, B.C. Metsch, and H.R. Petty, J. Phys. G 22, 1151 (1996).
Chan Hong-Mo, Nucl. Phys. A 335, 219 (1980); see references therein.
D. Gromes, Z. Phys. C 41, 427 (1988).
G.S. Bali, Phys. Rev. D 62, 114503 (2000).
C. Semay, Eur. Phys. J. A 22, 353 (2004).
B. Silvestre-Brac, C. Semay, I.M. Narodetskii, and A.I. Veselov, Eur. Phys. J. C 32, 385 (2004).
C. Semay, B. Silvestre-Brac, and I. M. Narodetskii, Phys. Rev. D 69, 014003 (2004).
D.B. Lichtenberg, W. Namgung, J.G. Wills, and E. Predazzi, Z. Phys. C 19, 19 (1983).
C. Semay, D. Baye, M. Hesse, and B. Silvestre-Brac, Phys. Rev. E 64, 016703 (2001).
P. Nunberg, D. Prosperi, and E. Pace, Nucl. Phys. A 285, 58 (1977); B. Silvestre-Brac, R. Bonnaz, C. Semay, and F. Brau, LPSC Grenoble Report No. ISN-00-66 (unpublished).
P. Nunberg, D. Prosperi, and E. Pace, Nucl. Phys. A 285, 58 (1977); B. Silvestre-Brac, R. Bonnaz, C. Semay, and F. Brau, LPSC Grenoble Report No. ISN-00-66 (unpublished).
R.D. Matheus et al., Phys. Lett. B 578, 323 (2004); J. Sugiyama, T. Doi, and M. Oka, Phys. Lett. B 581, 167 (2004).
R.D. Matheus et al., Phys. Lett. B 578, 323 (2004); J. Sugiyama, T. Doi, and M. Oka, Phys. Lett. B 581, 167 (2004).
F. Csikor, Z. Fodor, S. D. Katz, and T. G. Kovács, J. High Energy Phys. 11 (2003) 070; S. Sasaki, Phys. Rev. Lett. 93, 152001 (2004).
F. Csikor, Z. Fodor, S. D. Katz, and T. G. Kovács, J. High Energy Phys. 11 (2003) 070; S. Sasaki, Phys. Rev. Lett. 93, 152001 (2004).