Abnormal enhancement of dilepton yield in central heavy-ion collisions from local parity breaking

We propose a novel explanation for the dilepton excess observed in heavy ion collisions at invariant masses below 1 GeV. We argue that the presence of local parity breaking due to a time-dependent isosinglet and/or isotriplet pseudoscalar condensate substantially modifies the dispersion relation of...

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Detalles Bibliográficos
Autores principales: Andrianov, A.A., Andrianov, Vladimir A., Espriu, Domenec, Planells, Xumeu
Lenguaje:eng
Publicado: 2010
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1007/s11232-012-0003-z
http://cds.cern.ch/record/1302179
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author Andrianov, A.A.
Andrianov, Vladimir A.
Espriu, Domenec
Planells, Xumeu
author_facet Andrianov, A.A.
Andrianov, Vladimir A.
Espriu, Domenec
Planells, Xumeu
author_sort Andrianov, A.A.
collection CERN
description We propose a novel explanation for the dilepton excess observed in heavy ion collisions at invariant masses below 1 GeV. We argue that the presence of local parity breaking due to a time-dependent isosinglet and/or isotriplet pseudoscalar condensate substantially modifies the dispersion relation of photons and vector mesons propagating in such a medium, changing the \rho~ spectral function and resulting in a potentially large excess of e+e- and \mu+\mu- with respect to the theoretical predictions based in a 'cocktail' of known hadronic processes. Possible signatures to prove or disprove this effect are discussed.
id cern-1302179
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2010
record_format invenio
spelling cern-13021792023-03-12T05:03:52Zdoi:10.1007/s11232-012-0003-zhttp://cds.cern.ch/record/1302179engAndrianov, A.A.Andrianov, Vladimir A.Espriu, DomenecPlanells, XumeuAbnormal enhancement of dilepton yield in central heavy-ion collisions from local parity breakingParticle Physics - PhenomenologyWe propose a novel explanation for the dilepton excess observed in heavy ion collisions at invariant masses below 1 GeV. We argue that the presence of local parity breaking due to a time-dependent isosinglet and/or isotriplet pseudoscalar condensate substantially modifies the dispersion relation of photons and vector mesons propagating in such a medium, changing the \rho~ spectral function and resulting in a potentially large excess of e+e- and \mu+\mu- with respect to the theoretical predictions based in a 'cocktail' of known hadronic processes. Possible signatures to prove or disprove this effect are discussed.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.We propose a novel explanation for the dilepton excess observed in heavy ion collisions at invariant masses below 1 GeV. We argue that the presence of local parity breaking due to a time-dependent isosinglet and/or isotriplet pseudoscalar condensate substantially modifies the dispersion relation of photons and vector mesons propagating in such a medium, changing the \rho~ spectral function and resulting in a potentially large excess of e+e- and \mu+\mu- with respect to the theoretical predictions based in a 'cocktail' of known hadronic processes. Possible signatures to prove or disprove this effect are discussed.arXiv:1010.4688ICCUB-10-063ICCUB-10-063oai:cds.cern.ch:13021792010-10-25
spellingShingle Particle Physics - Phenomenology
Andrianov, A.A.
Andrianov, Vladimir A.
Espriu, Domenec
Planells, Xumeu
Abnormal enhancement of dilepton yield in central heavy-ion collisions from local parity breaking
title Abnormal enhancement of dilepton yield in central heavy-ion collisions from local parity breaking
title_full Abnormal enhancement of dilepton yield in central heavy-ion collisions from local parity breaking
title_fullStr Abnormal enhancement of dilepton yield in central heavy-ion collisions from local parity breaking
title_full_unstemmed Abnormal enhancement of dilepton yield in central heavy-ion collisions from local parity breaking
title_short Abnormal enhancement of dilepton yield in central heavy-ion collisions from local parity breaking
title_sort abnormal enhancement of dilepton yield in central heavy-ion collisions from local parity breaking
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1007/s11232-012-0003-z
http://cds.cern.ch/record/1302179
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AT andrianovvladimira abnormalenhancementofdileptonyieldincentralheavyioncollisionsfromlocalparitybreaking
AT espriudomenec abnormalenhancementofdileptonyieldincentralheavyioncollisionsfromlocalparitybreaking
AT planellsxumeu abnormalenhancementofdileptonyieldincentralheavyioncollisionsfromlocalparitybreaking

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