Quarkonium in a weakly-coupled quark-gluon plasma

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We report about a recent calculation of the heavy quarkonium mass and decay width in a quark-gluon plasma, whose temperature T and screening mass m_D satisfy the hierarchy m alpha_s >> pi T >> m alpha_s^2 >> m_D, m being the heavy-quark mass, up to order m alpha_s^5.

• The calculation may be relevant to understand the behavior of the Y(1S) in a quark-gluon plasma at present-day colliders.