TY - JOUR

T1 - ABNORMAL ENHANCEMENT OF DILEPTON YIELD IN CENTRAL HEAVY-ION COLLISIONS FROM LOCAL PARITY BREAKING

AU - Andrianov, A. A.

AU - Andrianov, V. A.

AU - Espriu, D.

AU - Planells, X.

PY - 2012

Y1 - 2012

N2 - We propose a new explanation for the dilepton excess observed in dense (hot) nuclear matter at invariant masses below 1GeV.We argue that the presence of local parity breaking due to a time-dependent isosinglet and/or isotriplet pseudoscalar condensate may substantially modify the dispersion relation of photons and vector mesons propagating in such a medium, resulting in an abnormally large excess of e+e−pairs with respect to the common theoretical predictions based on a “cocktail” of hadronic processes. We propose various signatures to prove or disprove this effect.

AB - We propose a new explanation for the dilepton excess observed in dense (hot) nuclear matter at invariant masses below 1GeV.We argue that the presence of local parity breaking due to a time-dependent isosinglet and/or isotriplet pseudoscalar condensate may substantially modify the dispersion relation of photons and vector mesons propagating in such a medium, resulting in an abnormally large excess of e+e−pairs with respect to the common theoretical predictions based on a “cocktail” of hadronic processes. We propose various signatures to prove or disprove this effect.

KW - superdense baryonic matter at high temperatures

KW - spontaneous parity breaking

U2 - DOI: 10.1007/s11232-012-0003-z

DO - DOI: 10.1007/s11232-012-0003-z

M3 - Article

VL - 170

SP - 17

EP - 25

JO - Theoretical and Mathematical Physics (Russian Federation)

JF - Theoretical and Mathematical Physics (Russian Federation)

SN - 0040-5779

IS - 1

ER -