Heavy quarkonia spectroscopy at zero and finite temperature in bottom-up AdS/QCD

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2021

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American Physical Society

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item.page.issne

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Instituto de Fisica y Astronomia

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Resumen

S-wave states of charmonium and bottomonium are described using bottom-up AdS/QCD. We propose a holographic model that unifies the description of masses and decay constants, leading to a precise match with experimental data on heavy quarkonia. Finite temperature effects are considered by calculating the current-current spectral functions of heavy vector mesons. The identification of quasiparticle states as Breit-Wigner resonances in the holographic spectral function was made. We develop a prescription to subtract background contributions from the spectral function to isolate the Breit-Wigner peak. The quasi-particle holographic thermal evolution is described, allowing us to estimate the melting temperature for vector charmonia and bottomonia. Our holographic model predicts that J/Ψ melts at 415 MeV(∼2.92Tc) and Υ melts at 465 MeV (∼3.27Tc).

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GAUGE-GRAVITY, DUALITIESPARTICLE PHENOMENA, PARTICLES & FIELDS

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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3

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