Dynamical dissociation of quarkonia by wave function decoherence

• Verfasst von: Kajimoto, Shiori [VerfasserIn]
• Verfasst von: Rothkopf, Alexander [VerfasserIn]
• Titel: Dynamical dissociation of quarkonia by wave function decoherence
• Verf.angabe: Shiori Kajimoto, Yukinao Akamatsu, and Masayuki Asakawa, Alexander Rothkopf
• Jahr: 2018
• Umfang: 8 S.
• Fussnoten: Identifizierung der Ressource nach: Last revised 31 Jan 2018 ; Gesehen am 11.12.2020
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2018
• Band/Heft Quelle: (2018) Artikel-Nummer 1705.03365, 8 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: High Energy Physics - Phenomenology
• Sach-SW: Nuclear Theory
• Sach-SW: Nuclear Experiment
• K10plus-PPN: 1570669619

Abstract

We investigate the real-time evolution of quarkonium bound states in a quark-gluon plasma in one dimension using an improved QCD based stochastic potential model. This model describes the quarkonium dynamics in terms of a Schr\"odinger equation with an in-medium potential and two noise terms encoding the residual interactions between the heavy quarks and the medium. The probabilities of bound states in a static medium and in a boost-invariantly expanding quark-gluon plasma are discussed. We draw two conclusions from our results: One is that the outcome of the stochastic potential model is qualitatively consistent with the experimental data in relativistic heavy-ion collisions. The other is that the noise plays an important role in order to describe quarkonium dynamics in medium, in particular it causes decoherence of the quarkonium wave function. The effectiveness of decoherence is controlled by a new length scale $l_{\rm corr}$. It represents the noise correlation length and its effect has not been included in existing phenomenological studies.