Production of deuterons, tritons, <SUP>3</SUP>He nuclei, and their antinuclei in pp collisions at √s=0.9, 2.76, and 7 TeV

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초록

Invariant differential yields of deuterons and antideuterons in pp collisions at root s = 0.9, 2.76 and 7 TeV and the yields of tritons, He-3 nuclei, and their antinuclei at root s = 7 TeV have been measured with the ALICE detector at the CERN Large Hadron Collider. The measurements cover a wide transverse momentum (p(T)) range in the rapidity interval vertical bar y vertical bar < 0.5, extending both the energy and the pT reach of previous measurements up to 3 GeV/c for A = 2 and 6 GeV/c for A = 3. The coalescence parameters of (anti) deuterons and 3 He nuclei exhibit an increasing trend with pT and are found to be compatible with measurements in pA collisions at low p(T) and lower energies. The integrated yields decrease by a factor of about 1000 for each increase of the mass number with one (anti) nucleon. Furthermore, the deuteron-to-proton ratio is reported as a function of the average charged particle multiplicity at different center-of-mass energies.

키워드

PROTON-PROTON COLLISIONSPHYSICS PERFORMANCE REPORTPB COLLISIONSLARGE ANGLESPARTICLESSEARCHPIONSALICE
제목
Production of deuterons, tritons, <SUP>3</SUP>He nuclei, and their antinuclei in pp collisions at √s=0.9, 2.76, and 7 TeV
저자
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DOI
10.1103/PhysRevC.97.024615
발행일
2018-02-21
유형
Article
저널명
Physical Review c
97
2