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Baryon and chiral symmetry breaking in holographic QCD
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Institute of Modern Physics, Chinese Academy of Sciences, China.
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). 5Institute for Theoretical and Experimental Physics (ITEP), Russia.
Number of Authors: 3
2015 (English)In: Physical Review D, ISSN 1550-7998, Vol. 91, no 12, 126008Article in journal (Refereed) Published
Abstract [en]

We study the relationship between chiral symmetry breaking and baryons in holographic QCD. We construct a soliton with unit baryon charge in the presence of a nonzero mean value of the scalar bifundamental field, which is dual to the chiral condensate. We obtain a relation between the chiral condensate and the mass of the baryon and find in a clear-cut way that at large values of the condensate the holographic soliton is no longer located on the IR wall. Instead it is split into two halves, which are symmetrically located on the left and right flavor branes. On the other hand we find that the local value of the quark condensate is suppressed in the core of the soliton, which is evidence for a partial chiral symmetry restoration inside the baryon.

Place, publisher, year, edition, pages
2015. Vol. 91, no 12, 126008
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:su:diva-118948DOI: 10.1103/PhysRevD.91.126008ISI: 000356405900009OAI: diva2:842810
Available from: 2015-07-22 Created: 2015-07-21 Last updated: 2015-07-22Bibliographically approved

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