Observation of light nuclei at ALICE and the X(3872) conundrum

A. Esposito, A. L. Guerrieri, L. Maiani, F. Piccinini, A. Pilloni, A. D. Polosa, and V. Riquer
Phys. Rev. D 92, 034028 – Published 28 August 2015

Abstract

The new data reported by ALICE on the production of light nuclei with p10GeV in Pb-Pb collisions at sNN=2.76TeV are used to compute an order-of-magnitude estimate of the expected production cross sections of light nuclei in proton-proton collisions at high transverse momenta. We compare the hypertriton, helium-3, and deuteron production cross sections to that of X(3872), measured in prompt pp collisions by CMS. The results we find suggest a different production mechanism for the X(3872), making questionable any loosely bound molecule interpretation.

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  • Received 4 August 2015

DOI:https://doi.org/10.1103/PhysRevD.92.034028

© 2015 American Physical Society

Authors & Affiliations

A. Esposito1, A. L. Guerrieri2, L. Maiani3, F. Piccinini4, A. Pilloni3, A. D. Polosa3, and V. Riquer3

  • 1Department of Physics, 538W 120th Street, Columbia University, New York, New York, 10027, USA
  • 2Dipartimento di Fisica and INFN, Università di Roma ‘Tor Vergata’ Via della Ricerca Scientifica 1, I-00133 Roma, Italy
  • 3Dipartimento di Fisica and INFN, ‘Sapienza’ Università di Roma P.le Aldo Moro 5, I-00185 Roma, Italy
  • 4INFN Pavia, Via A. Bassi 6, I-27100 Pavia, Italy

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Issue

Vol. 92, Iss. 3 — 1 August 2015

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