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

被引：45

作者：

Esposito, A. ^{[1
]}

Guerrieri, A. L. ^{[2
,3
]}

Maiani, L. ^{[4
,5
]}

Piccinini, F. ^{[6
]}

Pilloni, A. ^{[4
,5
]}

Polosa, A. D. ^{[4
,5
]}

Riquer, V. ^{[4
,5
]}

机构：

[1] Columbia Univ, Dept Phys, New York, NY 10027 USA

[2] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

[3] Univ Roma Tor Vergata, Ist Nazl Fis Nucl, I-00133 Rome, Italy

[4] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[5] Univ Roma La Sapienza, Ist Nazl Fis Nucl, I-00185 Rome, Italy

[6] Ist Nazl Fis Nucl, I-27100 Pavia, Italy

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 03期

关键词：

COLLISIONS; LHC;

D O I：

10.1103/PhysRevD.92.034028

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The new data reported by ALICE on the production of light nuclei with p(1) less than or similar to 0 GeV in Pb-Pb collisions at root 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.

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页数：5

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