Strong couplings of $X(3872{)}_{J=1,2}$ and a new look at $J/\ensuremath{\psi}$ suppression in heavy ion collisions

Strong couplings of $X (3872)_{J = 1, 2}$ and a new look at $J / ψ$ suppression in heavy ion collisions

F. Brazzi, B. Grinstein, F. Piccinini, A. D. Polosa, and C. Sabelli

Phys. Rev. D 84, 014003 – Published 5 July 2011

Abstract

We define and compute from data the strong couplings of the $X (3872)$ with both of the possible quantum numbers assignments $J^{PC} = 1^{++}$ , $2^{- +}$ . We use these to compute cross sections for $J / ψ$ resonance scattering into $D {\bar{D}}^{*}$ . As an application of the results obtained we revise the calculation of the $J / ψ$ absorption in a hot hadron gas to confront with recent RHIC observations in Au-Au collisions.

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Received 16 March 2011

DOI:https://doi.org/10.1103/PhysRevD.84.014003

Authors & Affiliations

F. Brazzi¹, B. Grinstein², F. Piccinini³, A. D. Polosa⁴, and C. Sabelli^1,5

¹Dipartimento di Fisica, Università di Roma “Sapienza”, Piazzale A. Moro 2, Roma, I-00185, Italy
²University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA
³INFN Pavia, Via A. Bassi 6, Pavia, I-27100, Italy
⁴Dipartimento di Fisica e di Medicina Molecolare, Università di Roma “Sapienza”, Piazzale A. Moro 2, I-00185, Italy
⁵INFN Roma, Piazzale A. Moro 2, Roma, I-00185, Italy

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Vol. 84, Iss. 1 — 1 July 2011

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Physical Review D

covering particles, fields, gravitation, and cosmology

Strong couplings of $X (3872)_{J = 1, 2}$ and a new look at $J / ψ$ suppression in heavy ion collisions

F. Brazzi, B. Grinstein, F. Piccinini, A. D. Polosa, and C. Sabelli

Phys. Rev. D 84, 014003 – Published 5 July 2011

Abstract

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Physical Review D

covering particles, fields, gravitation, and cosmology

Strong couplings of X(3872)J=1,2 and a new look at J/ψ suppression in heavy ion collisions

F. Brazzi, B. Grinstein, F. Piccinini, A. D. Polosa, and C. Sabelli

Phys. Rev. D 84, 014003 – Published 5 July 2011

Abstract

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Strong couplings of $X (3872)_{J = 1, 2}$ and a new look at $J / ψ$ suppression in heavy ion collisions