The new data reported by ALICE on the production of light nuclei with p⊥ ≲ 10 GeV in Pb-Pb collisions at sNN p ¼ 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 Xð3872Þ, measured in prompt pp collisions by CMS. The results we find suggest a different production mechanism for the Xð3872Þ, making questionable any loosely bound molecule interpretation.
Observation of light nuclei at ALICE and the X (3872) conundrum / Esposito, A.; Guerrieri, A. L.; Maiani, Luciano; Piccinini, F.; Pilloni, Alessandro; Polosa, ANTONIO DAVIDE; Riquer, Veronica. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 92:3(2015). [10.1103/PhysRevD.92.034028]
Observation of light nuclei at ALICE and the X (3872) conundrum
Esposito, A.;MAIANI, Luciano;PILLONI, ALESSANDRO;POLOSA, ANTONIO DAVIDE;RIQUER, Veronica
2015
Abstract
The new data reported by ALICE on the production of light nuclei with p⊥ ≲ 10 GeV in Pb-Pb collisions at sNN p ¼ 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 Xð3872Þ, measured in prompt pp collisions by CMS. The results we find suggest a different production mechanism for the Xð3872Þ, making questionable any loosely bound molecule interpretation.| File | Dimensione | Formato | |
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Esposito_Observation of light nuclei_2015.pdf
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