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Production of deuterons, tritons, $^{3}$He nuclei and their anti-nuclei in pp collisions at $\mathbf{\sqrt{{\textit s}}}$ = 0.9, 2.76 and 7 TeV

The ALICE collaboration
No Journal Information, 2017

Abstract (data abstract)
CERN-LHC. Invariant differential yields of deuterons and antideuterons in pp collisions at $\sqrt{s}$ = 0.9, 2.76 and 7 TeV and the yields of tritons, $^{3}$He nuclei and their antinuclei at $\sqrt{s}$ = 7 TeV have been measured with the ALICE detector at the CERN Large Hadron Collider. The measurements cover a wide transverse momentum ($p_{\text{T}}$) range in the rapidity interval $|y|<0.5$, extending both the energy and the $p_{\text{T}}$ 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 $^{3}\overline{\text{He}}$ nuclei exhibit an increasing trend with $p_{\text{T}}$ and are found to be compatible with measurements in pA collisions at low $p_{\text{T}}$ 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.

  • Table 1

    Fig. 5

    10.17182/hepdata.81951.v1/t1

    Invariant differential yield of deuterons and antideuterons in inelastic pp collisions at $\sqrt{s}$ = 0.9 TeV. The uncertainties of $_{-0.8}^{+2.2}$%...

  • Table 2

    Fig. 5

    10.17182/hepdata.81951.v1/t2

    Invariant differential yield of deuterons and antideuterons in inelastic pp collisions at $\sqrt{s}$ = 2.76 TeV. The uncertainties of $_{-2.8}^{+5.2}$%...

  • Table 3

    Fig. 5

    10.17182/hepdata.81951.v1/t3

    Invariant differential yield of deuterons and antideuterons in inelastic pp collisions at $\sqrt{s}$ = 7 TeV. The uncertainties of $_{-2.0}^{+5.0}$%...

  • Table 4

    Fig. 7

    10.17182/hepdata.81951.v1/t4

    Invariant differential yields of tritons and antitritons in inelastic pp collisions at $\sqrt{s}$ = 7 TeV. The uncertainties of $_{-2.0}^{+5.0}$%...

  • Table 5

    Fig. 7

    10.17182/hepdata.81951.v1/t5

    Invariant differential yields of $^{3}$He and $^{3}\overline{\text{He}}$ nuclei in inelastic pp collisions at $\sqrt{s}$ = 7 TeV. The uncertainties of...

  • Table 6

    Fig. 8

    10.17182/hepdata.81951.v1/t6

    Coalescence parameter ($B_{2}$) of deuterons and antideuterons in inelastic pp collisions at $\sqrt{s}$ = 0.9 TeV.

  • Table 7

    Fig. 8

    10.17182/hepdata.81951.v1/t7

    Coalescence parameter ($B_{2}$) of deuterons and antideuterons in inelastic pp collisions at $\sqrt{s}$ = 2.76 TeV.

  • Table 8

    Fig. 8

    10.17182/hepdata.81951.v1/t8

    Coalescence parameter ($B_{2}$) of deuterons and antideuterons in inelastic pp collisions at $\sqrt{s}$ = 7 TeV.

  • Table 9

    Fig. 11

    10.17182/hepdata.81951.v1/t9

    Coalescence parameter ($B_{3}$) of tritons and antitritons in inelastic pp collisions at $\sqrt{s}$ = 7 TeV.

  • Table 10

    Fig. 11

    10.17182/hepdata.81951.v1/t10

    Coalescence parameter ($B_{3}$) of $^{3}$He and $^{3}\overline{\text{He}}$ nuclei in inelastic pp collisions at $\sqrt{s}$ = 7 TeV.

  • Table 11

    Fig. 13

    10.17182/hepdata.81951.v1/t11

    Integrated deuteron-to-proton (d/p) and antideuteron-to-antiproton ($\overline{\text{d}}/\overline{\text{p}}$) ratios in inelastic pp collisions as a function of the average charged particle multiplicity...

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