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PCAC and Modifications in Hadron Properties in Nuclear Medium

Pasupathy, J (1997) PCAC and Modifications in Hadron Properties in Nuclear Medium. In: Modern Physics Letters A, 12 (26). pp. 1943-1949.

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It is known that the Adler zero condition when imposed on pion amplitudes leads to several relations between hadron masses through the dual resonance formula of Lovelace, Shapiro and Veneziano. In particular the Lovelace quantization condition leads to the relation $\alpha^1(m^2_p-m^2_\pi)=1/2$ which is well satisfied experimentally. The Regge slope parameter α′ can be related to the gluon condensate. The latter is modified in the nuclear medium as compared to its value in the QCD vacuum. Combining the PCAC hypothesis with changes in gluon condensate leads to lowering of vector masses in the nuclear medium. It also leads to predictions regarding, nucleon isobar mass differences, pion decay constant in the medium, pion amplitudes and transverse momentum distribution of secondaries in heavy ion collisions.

Item Type: Journal Article
Publication: Modern Physics Letters A
Publisher: World Scientific
Additional Information: Copyright of this article belongs to World Scientific.
Department/Centre: Division of Physical & Mathematical Sciences > Centre for Theoretical Studies (Ceased to exist at the end of 2003)
Date Deposited: 13 Jul 2007
Last Modified: 27 Aug 2008 12:42
URI: http://eprints.iisc.ac.in/id/eprint/10206

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