Doubly heavy baryons with chiral partner structure

被引：18

作者：

Ma, Yong-Liang ^{[1
,2
]}

Harada, Masayasu ^{[3
]}

机构：

[1] Jilin Univ, Ctr Theoret Phys, Changchun 130012, Peoples R China

[2] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China

[3] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan

来源：

PHYSICS LETTERS B | 2015年 / 748卷

基金：

美国国家科学基金会;

关键词：

QUARK; HADRONS; SYMMETRY; SEARCH;

D O I：

10.1016/j.physletb.2015.07.046

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The spectrum and dominant strong decay properties of the doubly heavy baryons are revisited by using a chiral effective model with the chiral partner structure. By regarding the doubly heavy baryons in the ground states and light angular momentum, j(l) = 1/2, sector of the first orbitally excited states as chiral partners, we estimate their mass splitting arising from the spontaneous breaking of chiral symmetry to be about 430 MeV for baryons including an unflavored light quark and about 350 MeV for that including a strange quark. We point out that, similar to the heavy-light meson sector, the intermultiplet decay from a baryon with negative parity to its chiral partner and a pion is determined by the mass splitting through the generalized Goldberger-Treiman relation. Furthermore, the isospin-violating decay of the Omega(cc) baryon, ((1/2)(-), (3/2)(-))(s) -> ((1/2)(+), (3/2)(+))(s) + pi(0), through the eta-pi(0) mixing is the dominant decay channel of the doubly heavy baryons including a strange quark. (C) 2015 The Authors. Published by Elsevier B.V.

引用

页码：463 / 466

页数：4

共 31 条

[1]

Aaij R., 2013, J High Energy Phys, V1312, DOI 10.1007/JHEP12(2013)090

[2] Search for doubly charmed baryons Ξcc+ and Ξcc++ in BABAR [J].

Aubert, B. ;

Barate, R. ;

Bona, M. ;

Boutigny, D. ;

Couderc, F. ;

Karyotakis, Y. ;

Lees, J. P. ;

Poireau, V. ;

Tisserand, V. ;

Zghiche, A. ;

Grauges, E. ;

Palano, A. ;

Chen, J. C. ;

Qi, N. D. ;

Rong, G. ;

Wang, P. ;

Zhu, Y. S. ;

Eigen, G. ;

Ofte, I. ;

Stugu, B. ;

Abrams, G. S. ;

Battaglia, M. ;

Brown, D. N. ;

Shafer, J. Button- ;

Cahn, R. N. ;

Charles, E. ;

Gill, M. S. ;

Groysman, Y. ;

Jacobsen, R. G. ;

Kadyk, J. A. ;

Kerth, L. T. ;

Kolomensky, Yu. G. ;

Kukartsev, G. ;

Lynch, G. ;

Mir, L. M. ;

Oddone, P. J. ;

Orimoto, T. J. ;

Pripstein, M. ;

Roe, N. A. ;

Ronan, M. T. ;

Wenzel, W. A. ;

del Amo Sanchez, P. ;

Barrett, M. ;

Ford, K. E. ;

Harrison, T. J. ;

Hart, A. J. ;

Hawkes, C. M. ;

Morgan, S. E. ;

Watson, A. T. ;

Goetzen, K. .

PHYSICAL REVIEW D, 2006, 74 (01)

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

Bardeen, WA ;

Eichten, EJ ;

Hill, CT .

PHYSICAL REVIEW D, 2003, 68 (05)

[4] 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

[5]

Brambilla N, 2005, PHYS REV D, V72, DOI [10.1103/PhysRevD.72.034021, 10.1103/PhysRevB.72.034021]

[6] Isospin splittings of doubly heavy baryons [J].

Brodsky, Stanley J. ;

Guo, Feng-Kun ;

Hanhart, Christoph ;

Meissner, Ulf-G. .

PHYSICS LETTERS B, 2011, 698 (03) :251-255

[7] Charmed bottom baryon spectroscopy from lattice QCD [J].

Brown, Zachary S. ;

Detmold, William ;

Meinel, Stefan ;

Orginos, Kostas .

PHYSICAL REVIEW D, 2014, 90 (09)

[8] Observation of new states decaying into ΛcK-π+ and Λc+KS0π- [J].

Chistov, R. ;

Abe, K. ;

Adachi, I. ;

Aihara, H. ;

Anipko, D. ;

Aulchenko, V. ;

Aushev, T. ;

Bakich, A. M. ;

Balagura, V. ;

Barberio, E. ;

Bay, A. ;

Bedny, I. ;

Belous, K. ;

Bitenc, U. ;

Bizjak, I. ;

Blyth, S. ;

Bondar, A. ;

Bozek, A. ;

Bracko, M. ;

Brodzicka, J. ;

Browder, T. E. ;

Chang, M. -C. ;

Chao, Y. ;

Chen, A. ;

Chen, K. -F. ;

Chen, W. T. ;

Cheon, B. G. ;

Choi, Y. ;

Choi, Y. K. ;

Chuvikov, A. ;

Cole, S. ;

Dalseno, J. ;

Danilov, M. ;

Dash, M. ;

Dragic, J. ;

Drutskoy, A. ;

Eidelman, S. ;

Epifanov, D. ;

Gabyshev, N. ;

Garmash, A. ;

Gershon, T. ;

Go, A. ;

Gokhroo, G. ;

Golob, B. ;

Gorisek, A. ;

Ha, H. ;

Haba, J. ;

Hara, T. ;

Hayasaka, K. .

PHYSICAL REVIEW LETTERS, 2006, 97 (16)

[9] CHIRAL PERTURBATION-THEORY FOR HADRONS CONTAINING A HEAVY QUARK - THE SEQUEL [J].

CHO, P .

PHYSICS LETTERS B, 1992, 285 (1-2) :145-152

[10] HADRONS OF ARBITRARY SPIN IN THE HEAVY-QUARK EFFECTIVE THEORY [J].

FALK, AF .

NUCLEAR PHYSICS B, 1992, 378 (1-2) :79-94

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