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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