The impact of chirally odd condensates on the rho meson

Hilger, T.; Thomas, R.; Kämpfer, B.; Leupold, Stefan

doi:10.1016/j.physletb.2012.02.007

Cited by 23 publications

(39 citation statements)

References 79 publications

(85 reference statements)

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“…An interesting sector in between the chiral and heavyquark regimes is the sector of open-flavour mesons such as the D-meson [2,[120][121][122]. For these states an infraredfinite OPE requires the introduction of non-normal ordered condensates, which results in a cancellation of heavy-quark-mass expansion and renormalization contributions [94,123].…”

Section: In-hadron Condensatementioning

confidence: 99%

Aspects of open-flavour mesons in a comprehensive DSBSE study

et al. 2017

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Open-flavour meson studies are the necessary completion to any comprehensive investigation of quarkonia. We extend recent studies of quarkonia in the Dyson-Schwinger-Bethe-Salpeter-equation approach to explore their results for all possible flavour combinations. Within the inherent limitations of the setup, we present the most comprehensive results for meson masses and leptonic decay constants currently available and put them in perspective with respect to experiment and other approaches.

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Section: In-hadron Condensatementioning

confidence: 99%

Aspects of open-flavour mesons in a comprehensive DSBSE study

et al. 2017

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“…In particular, contrary to light-quark mesons, where the chiral condensate is suppressed by the light-quark mass [16], and heavy-quark mesons, where the chiral condensate only enters indirectly via higher-order terms of the operator product expansion [17], for open-flavor mesons the chiral condensate's numerical impact is enhanced by the heavy-quark mass [18][19][20]. Therefore, in particular quasi-exotic open-flavor mesons [21] are expected to be extremely sensitive probes of DχSB and its restoration at higher densities and/or temperatures.…”

Section: Introductionmentioning

confidence: 98%

Charming quasi-exotic open-flavor mesons

Hilger

Krassnigg

2017

EPJ Web Conf.

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“…As a by-product, we test the QCDSRs for the vector channel. Similar works have been performed, e.g., in the low-temperature limit [18,19], for heavy-quark channels [23], or by focusing on chirally odd condensates in the vector channel only [24]. A recent study [20] parallels some of the philosophies of the current work by investigating whether finite energy WSRs can be satisfied with axial-/vector spectral functions constrained by finite energy QCDSRs [21,22].…”

Section: Introductionmentioning

confidence: 56%

Probing chiral restoration with ρ-meson melting through sum rules

Hohler

Rapp

2014

J. Phys.: Conf. Ser.

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Abstract. We investigate whether the rho-meson melting scenario is compatible with chiral symmetry restoration utilizing a comprehensive evaluation of the QCD and Weinberg sum rules at finite temperature. As input to this analysis, in-medium vector spectral functions which describe dilepton data from ultra-relativistic heavy-ion collisions are used along with temperature dependent condensates from lattice calculations, when available, or approximated by a hadron resonance gas. The combined deployment of QCD and Weinberg sum rules turns out to be rather stringent in constructing axialvector spectral functions consistent with (partial) chiral restoration. IntroductionIn the QCD vacuum, chiral symmetry is spontaneously broken by the presence of non-zero quark condensates. Lattice-QCD calculations reveal that this symmetry becomes restored at higher temperatures as the condensates progress through a pseudo-critical region around T pc ≃ 160 MeV [1,2]. A long standing problem in hadronic physics is identifying an experimental signal for this transition. Ideally, this could be achieved by simultaneously measuring the medium modifications of the spectral functions of chiral partners, e.g., vector (ρ) and axialvector (a 1 ) mesons; chiral restoration is then characterized by a degeneracy of the two channel's spectral functions. The vector channel has been extensively explored through dilepton spectra in ultrarelativistic heavy-ion collisions [3,4,5]. Theoretical calculations from hadronic effective theory using microscopic interactions [6] are consistent with the experimental data across a wide range of collision energies. These studies reveal that the ρ-meson resonance "melts" without an appreciable mass shift as the fireball cools through the pseudo-critical region [7]. Experimental access to the axialvector channel (a 1 → πγ) is difficult due to its small branching and large width. Thus establishing this melting as a signal for chiral restoration remains outstanding. A theoretical determination of the axialvector spectral function is therefore needed to provide the necessary connection between the ρ melting and chiral symmetry.

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The impact of chirally odd condensates on the rho meson

Cited by 23 publications

References 79 publications

Aspects of open-flavour mesons in a comprehensive DSBSE study

Aspects of open-flavour mesons in a comprehensive DSBSE study

Charming quasi-exotic open-flavor mesons

Probing chiral restoration with ρ-meson melting through sum rules

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