Can X(5568) be described as a Bsπ, B(K)over-bar resonant state?

被引：48

作者：

Albaladejo, Miguel ^{[1
]}

Nieves, Juan ^{[1
]}

Oset, Eulogio ^{[1
]}

Sun, Zhi-Feng ^{[1
]}

Liu, Xiang ^{[2
,3
,4
]}

机构：

[1] Univ Valencia, CSIC, Inst Invest Paterna, Inst Fis Corpuscular IFIC,Ctr Mixto, Aptd 22085, E-46071 Valencia, Spain

[2] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China

[3] Lanzhou Univ, Res Ctr Hadron & CSR Phys, Lanzhou 730000, Peoples R China

[4] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

来源：

PHYSICS LETTERS B | 2016年 / 757卷

关键词：

MESONS;

D O I：

10.1016/j.physletb.2016.04.033

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The DO Collaboration has recently seen a resonant-like peak in the B-s pi invariant mass spectrum, claimed to be a new state called X(5568). Using a B-s pi-B (K) over bar coupled channel analysis, implementing unitarity, and with the interaction derived from Heavy Meson Chiral Perturbation Theory, we are able to reproduce the reported spectrum, with a pole that can be associated to the claimed X(5568) state, and with mass and width in agreement with the ones reported in the experimental analysis. However, if the T-matrix regularization is performed by means of a momentum cutoff, the value for the latter needed to reproduce the spectrum is Lambda = 2.80 +/- 0.04 GeV, which is much larger than a "natural" value Lambda similar or equal to 1 GeV. In view of this, it is difficult to interpret the nature of this new state. This state would not qualify as a resonance dynamically generated by the unitarity loops. Assuming the observed peak to correspond to a physical state, we make predictions for partners in the D, D*, and B* sectors. Their observation (or lack thereof) would shed light into this issue. (C) 2016 The Authors. Published by Elsevier B.V.

引用

页码：515 / 519

页数：5

共 39 条

[1]

ABAZOV VM, PHYS REV LETT UNPUB

[2]

Agaev S.S., ARXIV160301471HEPPH

[3]

Agaev S.S., ARXIV160208642HEPPH

[4]

Agaev S. S., ARXIV160302708HEPPH

[5]

Agaev S.S., ARXIV160300290HEPPH

[6] Scattering lengths of Nambu-Goldstone bosons off D mesons and dynamically generated heavy-light mesons [J].

Altenbuchinger, M. ;

Geng, L. -S. ;

Weise, W. .

PHYSICAL REVIEW D, 2014, 89 (01)

[7]

[Anonymous], 1999, PHYS REV D

[8] Study of the D*sJ(2317)+ and DsJ(2460)+ mesons in inclusive cc- production near √s=10.6 GeV [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. ;

Pappagallo, M. ;

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. ;

Button-Shafer, J. ;

Cahn, R. N. ;

Charles, E. ;

Day, C. T. ;

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. ;

Barrett, M. ;

Ford, K. E. ;

Harrison, T. J. ;

Hart, A. J. ;

Hawkes, C. M. ;

Morgan, S. E. ;

Watson, A. T. .

PHYSICAL REVIEW D, 2006, 74 (03)

[9] NONLINEAR REALIZATION AND HIDDEN LOCAL SYMMETRIES [J].

BANDO, M ;

KUGO, T ;

YAMAWAKI, K .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1988, 164 (4-5) :217-314

[10]

Burns T. J., ARXIV160304366HEPPH

← 1 2 3 4 →