Chinese Physics C > 2010, Vol. 34 > Issue(9): 1298-1302 DOI: 10.1088/1674-1137/34/9/028

Exotic pentaquarks as Gamov—Teller resonances

Dmitri Diakonov^,

Petersburg Nuclear Physics Institute, Gatchina 188300, St. Petersburg, Russia

Abstract
HTML
Reference
Related

PDF

Abstract：

If the number of colorsN_cis taken large, baryons and their excitations can be considered in a mean-field approach. We argue that the mean field in baryons breaks spontaneously the spherical andSU(3) flavor symmetries, but retains theSU(2) symmetry of simultaneous rotations in space and isospace. The one-quark and quark-hole excitations in the mean field, together with theSU(3) rotational bands about them determine the spectrum of baryon resonances, which turns out to be in good accordance with reality when one putsNc=3. A by-product of this scheme is a confirmation of the light pentaquark Θ⁺baryon uudds as a typical Gamov—Teller resonance long known in nuclear physics. An extension of the same large-N_clogic to charmed baryons leads to a prediction of a anti-decapenta (15)-plet of charmed pentaquarks, two of which, B⁺⁺_c=cuuds and B⁺_c= cudds, may be light and stable with respect to strong decays.

References

[1]

Witten E. Nucl. Phys. B, 1979, 160: 57-1152 Diakonov D. Prog. Part. Nucl. Phys., 2003, 51: 173-2223 Diakonov D, Petrov V, Pobylitsa P. Nucl. Phys. B, 1988,306: 809-8484 Diakonov D. JETP Letters, 2009, 90: 407-411; Nucl. Phys.A, 2009, 827: 264C-266C5 Diakonov D, Petrov V. The Multifaceted skyrmion, eds.Brown G and Rho M, World Scienti c, 2010. 57; arXiv:0812.1212 [hep-ph]6 Witten E. Nucl. Phys. B, 1983, 223: 433-4447 Blotz A, Diakonov D, Goeke K et al. Nucl. Phys. A, 1993,355: 765-7928 ZOU B S. Eur. Phys. J. A, 2008, 35: 325-3289 Diakonov D, Petrov V, Polyakov M. Zeit. Phys. A, 1997,359: 305-31410 Diakonov D, Petrov V. Phys. Rev. D, 2004, 69: 05600211 WU B, MA B Q. Phys. Rev. D, 2004, 70: 03402512 Diakonov D. arXiv:1003.2157[hep-ph]

Access

Get Citation

Dmitri Diakonov. Exotic pentaquarks as Gamov—Teller resonances[J]. Chinese Physics C, 2010, 34(9): 1298-1302. doi: 10.1088/1674-1137/34/9/028

Dmitri Diakonov. Exotic pentaquarks as Gamov—Teller resonances[J]. Chinese Physics C, 2010, 34(9): 1298-1302. doi:10.1088/1674-1137/34/9/028 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2010-02-09
Revised: 1900-01-01

Article Metric

Article Views(3701)
PDF Downloads(513)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者:陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Exotic pentaquarks as Gamov—Teller resonances

Dmitri Diakonov^,

Corresponding author:Dmitri Diakonov,

Petersburg Nuclear Physics Institute, Gatchina 188300, St. Petersburg, Russia

Received Date:2010-02-09
Accepted Date:1900-01-01
Available Online:2010-09-05

Abstract:

If the number of colorsN_cis taken large, baryons and their excitations can be considered in a mean-field approach. We argue that the mean field in baryons breaks spontaneously the spherical andSU(3) flavor symmetries, but retains theSU(2) symmetry of simultaneous rotations in space and isospace. The one-quark and quark-hole excitations in the mean field, together with theSU(3) rotational bands about them determine the spectrum of baryon resonances, which turns out to be in good accordance with reality when one putsNc=3. A by-product of this scheme is a confirmation of the light pentaquark Θ⁺baryon uudds as a typical Gamov—Teller resonance long known in nuclear physics. An extension of the same large-N_clogic to charmed baryons leads to a prediction of a anti-decapenta (15)-plet of charmed pentaquarks, two of which, B⁺⁺_c=cuuds and B⁺_c= cudds, may be light and stable with respect to strong decays.