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

The new data reported by ALICE on the production of light nuclei with pT < 10 GeV in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV 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.

preprint2015arXivOpen access
A. EspositoA. L. GuerrieriL. MaianiF. PiccininiA. PilloniA. D. PolosaV. Riquer
hep-phnucl-th
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A. EspositoA. L. GuerrieriL. MaianiF. PiccininiA. PilloniA. D. PolosaV. Riquer

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