Beam Energy Dependence of Triton Production and Yield Ratio ($\mathrm{N}_t \times \mathrm{N}_p/\mathrm{N}_d^2$) in Au+Au Collisions at RHIC

The STAR collaboration
Phys.Rev.Lett. 130 (2023) 202301, 2023.

Abstract (data abstract)
We report the triton ($t$) production in mid-rapidity ($|y| <$ 0.5) Au+Au collisions at $\sqrt{s_\text{NN}}$ = 7.7--200 GeV measured by the STAR experiment from the first phase of the beam energy scan at the Relativistic Heavy Ion Collider (RHIC). The nuclear compound yield ratio (\(N_t\)\(\times\)\(N_p\)/\(N_d^2\)), which is predicted to be sensitive to the fluctuation of local neutron density, is observed to decrease monotonically with increasing charged-particle multiplicity (dN\(_{ch}\)/d\(\eta\)) and follows a scaling behavior. The dN\(_{ch}\)/d\(\eta\) dependence of the yield ratio is compared to calculations from coalescence and thermal models. Enhancements in the yield ratios relative to the coalescence baseline are observed in the 0%-10% most central collisions at 19.6 and 27 GeV, with a significance of 2.3$\sigma$ and 3.4$\sigma$, respectively, giving a combined significance of 4.1$\sigma$. The enhancements are not observed in peripheral collisions or model calculations without critical fluctuation, and decreases with a smaller $p_{T}$ acceptance. The physics implications of these results on the QCD phase structure and the production mechanism of light nuclei in heavy-ion collisions are discussed.

  • Figure1, Triton pT spectra, Au+Au 7.7 GeV

    10.17182/hepdata.133992.v1/t1

    Invariant yields of tritons at 7.7 GeV, all centralities. The first uncertainty is statistical uncertainty, the second is systematic uncertainty.

  • Figure1, Triton pT spectra, Au+Au 11.5 GeV

    10.17182/hepdata.133992.v1/t2

    Invariant yields of tritons at 11.5 GeV, all centralities. The first uncertainty is statistical uncertainty, the second is systematic uncertainty.

  • Figure1, Triton pT spectra, Au+Au 14.5 GeV

    10.17182/hepdata.133992.v1/t3

    Invariant yields of tritons at 14.5 GeV, all centralities. The first uncertainty is statistical uncertainty, the second is systematic uncertainty.

  • Figure1, Triton pT spectra, Au+Au 19.6 GeV

    10.17182/hepdata.133992.v1/t4

    Invariant yields of tritons at 19.6 GeV, all centralities. The first uncertainty is statistical uncertainty, the second is systematic uncertainty.

  • Figure1, Triton pT spectra, Au+Au 27 GeV

    10.17182/hepdata.133992.v1/t5

    Invariant yields of tritons at 27 GeV, all centralities. The first uncertainty is statistical uncertainty, the second is systematic uncertainty.

  • Figure1, Triton pT spectra, Au+Au 39 GeV

    10.17182/hepdata.133992.v1/t6

    Invariant yields of tritons at 39 GeV, all centralities. The first uncertainty is statistical uncertainty, the second is systematic uncertainty.

  • Figure1, Triton pT spectra, Au+Au 54.4 GeV

    10.17182/hepdata.133992.v1/t7

    Invariant yields of tritons at 54.4 GeV, all centralities. The first uncertainty is statistical uncertainty, the second is systematic uncertainty.

  • Figure1, Triton pT spectra, Au+Au 62.4 GeV

    10.17182/hepdata.133992.v1/t8

    Invariant yields of tritons at 62.4 GeV, all centralities. The first uncertainty is statistical uncertainty, the second is systematic uncertainty.

  • Figure1, Triton pT spectra, Au+Au 200 GeV

    10.17182/hepdata.133992.v1/t9

    Invariant yields of tritons at 200 GeV, all centralities. The first uncertainty is statistical uncertainty, the second is systematic uncertainty.

  • Figure1, Triton integral yields dN/dy

    Data for triton integral dN/dy

    10.17182/hepdata.133992.v1/t10

    Triton integral dN/dy in Au+Au collisions at SQRT(s_NN) = 7.7, 11.5, 14.5, 19.6, 27, 39, 54.4, 62.4, 200 GeV, all...

  • Table for inclusive proton pT spectra, Au+Au 54.4 GeV

    10.17182/hepdata.133992.v1/t11

    Invariant yields of inclusive proton at 54.4 GeV with DCA < 3 cm, all centralities

  • Table for inclusive proton integral yields dN/dy, Au+Au 54.4 GeV

    10.17182/hepdata.133992.v1/t12

    Inclusive proton integral dN/dy in Au+Au collisions at SQRT(s_NN) = 54.4 GeV, with DCA < 3 cm.

  • Table for deuteron pT spectra, Au+Au 54.4 GeV

    10.17182/hepdata.133992.v1/t13

    Invariant yields of deuteron at 54.4 GeV, all centralities

  • Table for deuteron integral yields dN/dy

    Data for deuteron integral dN/dy, Other BES-I data can taken from [Phys. Rev. C 99, 064905 (2019)]

    10.17182/hepdata.133992.v1/t14

    Deuteron integral dN/dy in Au+Au collisions at SQRT(s_NN) = 54.4 GeV, all centrality

  • Figure2

    10.17182/hepdata.133992.v1/t15

    Particle yield ratios at 7.7, 11.5, 14.5, 19.6, 27, 39, 54.4, 62.4, and 200 GeV, 0%-10% centrality

  • Figure3

    10.17182/hepdata.133992.v1/t16

    Charged-particle multiplicity (dN_{ch}/d\eta) of light nuclei yield ratio, all centralities

  • Figure4

    10.17182/hepdata.133992.v1/t17

    Collision energy, centrality, and p_{T} dependence of light nuclei yield, 0%-10% and 40%-80% centrality

  • TableA 1-2, primordial proton pT spectra, Au+Au 7.7 GeV, 0-60%

    Data for primordial proton from data-driven methods

    10.17182/hepdata.133992.v1/t18

    Invariant p_{T} spectra of primordial protons in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7 GeV at 0-60% centrality

  • TableA 2-2, primordial proton pT spectra, Au+Au 7.7 GeV, 60-80%

    Data for primordial proton from data-driven methods

    10.17182/hepdata.133992.v1/t19

    Invariant p_{T} spectra of primordial protons in Au+Au collisions at SQRT(s_NN) = 7.7 GeV at 60-80% centrality

  • TableA 3-4, primordial proton pT spectra, Au+Au 11.5 GeV

    Data for primordial proton from data-driven methods

    10.17182/hepdata.133992.v1/t20

    Invariant p_{T} spectra of primordial protons in Au+Au collisions at SQRT(s_NN) = 11.5 GeV, all centrality

  • TableA 5-6, primordial proton pT spectra, Au+Au 14.5 GeV

    Data for primordial proton from data-driven methods

    10.17182/hepdata.133992.v1/t21

    Invariant p_{T} spectra of primordial protons in Au+Au collisions at SQRT(s_NN) = 14.5 GeV

  • TableA 7-8, primordial proton pT spectra, Au+Au 19.6 GeV

    Data for primordial proton from data-driven methods

    10.17182/hepdata.133992.v1/t22

    Invariant p_{T} spectra of primordial protons in Au+Au collisions at SQRT(s_NN) = 19.6 GeV

  • TableA 9-10, primordial proton pT spectra, Au+Au 27 GeV

    Data for primordial proton from data-driven methods

    10.17182/hepdata.133992.v1/t23

    Invariant p_{T} spectra of primordial protons in Au+Au collisions at SQRT(s_NN) = 27 GeV

  • TableA 11-12, primordial proton pT spectra, Au+Au 39 GeV

    Data for primordial proton from data-driven methods

    10.17182/hepdata.133992.v1/t24

    Invariant p_{T} spectra of primordial protons in Au+Au collisions at SQRT(s_NN) = 39 GeV

  • TableA 13-14, primordial proton pT spectra, Au+Au 54.4 GeV

    Data for primordial proton from data-driven methods

    10.17182/hepdata.133992.v1/t25

    Invariant p_{T} spectra of primordial protons in Au+Au collisions at SQRT(s_NN) = 54.4 GeV

  • TableA 15-16, primordial proton pT spectra, Au+Au 62.4 GeV

    Data for primordial proton from data-driven methods

    10.17182/hepdata.133992.v1/t26

    Invariant p_{T} spectra of primordial protons in Au+Au collisions at SQRT(s_NN) = 62.4 GeV

  • TableB 19-20, primordial antiproton pT spectra, Au+Au 7.7 GeV

    Data for primordial antiproton from data-driven methods

    10.17182/hepdata.133992.v1/t27

    Invariant p_{T} spectra of primordial antiprotons in Au+Au collisions at SQRT(s_NN) = 7.7 GeV at 0-60% centrality

  • TableB 20-20, primordial antiproton pT spectra, Au+Au 7.7 GeV

    Data for primordial antiproton from data-driven methods

    10.17182/hepdata.133992.v1/t28

    Invariant p_{T} spectra of primordial antiprotons in Au+Au collisions at SQRT(s_NN) = 7.7 GeV at 60-80% centrality

  • TableB 21-21, primordial antiproton pT spectra, Au+Au 11.5 GeV

    Data for primordial antiproton from data-driven methods

    10.17182/hepdata.133992.v1/t29

    Invariant p_{T} spectra of primordial antiprotons in Au+Au collisions at SQRT(s_NN) = 11.5 GeV at 0-40% centrality

  • TableB 22-22, primordial antiproton pT spectra, Au+Au 11.5 GeV

    Data for primordial antiproton from data-driven methods

    10.17182/hepdata.133992.v1/t30

    Invariant p_{T} spectra of primordial antiprotons in Au+Au collisions at SQRT(s_NN) = 11.5 GeV at 40-80% centrality

  • TableB 23-24, primordial antiproton pT spectra, Au+Au 14.5 GeV

    Data for primordial antiproton from data-driven methods

    10.17182/hepdata.133992.v1/t31

    Invariant p_{T} spectra of primordial antiprotons in Au+Au collisions at SQRT(s_NN) = 14.5 GeV, all centrality

  • TableB 25-26, primordial antiproton pT spectra, Au+Au 19.6 GeV

    Data for primordial antiproton from data-driven methods

    10.17182/hepdata.133992.v1/t32

    Invariant p_{T} spectra of primordial antiprotons in Au+Au collisions at SQRT(s_NN) = 19.6 GeV, all centrality

  • TableB 27-28, primordial antiproton pT spectra, Au+Au 27 GeV

    Data for primordial antiproton from data-driven methods

    10.17182/hepdata.133992.v1/t33

    Invariant p_{T} spectra of primordial antiprotons in Au+Au collisions at SQRT(s_NN) = 27 GeV, all centrality

  • TableB 29-30, primordial antiproton pT spectra, Au+Au 39 GeV

    Data for primordial antiproton from data-driven methods

    10.17182/hepdata.133992.v1/t34

    Invariant p_{T} spectra of primordial antiprotons in Au+Au collisions at SQRT(s_NN) = 39 GeV, all centrality

  • TableB 31-32, primordial antiproton pT spectra, Au+Au 62.4 GeV

    Data for primordial antiproton from data-driven methods

    10.17182/hepdata.133992.v1/t35

    Invariant p_{T} spectra of primordial antiprotons in Au+Au collisions at SQRT(s_NN) = 62.4 GeV, all centrality

  • TableC 33-34, Integral yields dN/dy of primordial proton

    Integral yields dN/dy of primordial protons from data-driven methods

    10.17182/hepdata.133992.v1/t36

    Integral yields dN/dy of primordial protons in Au+Au collisions at SQRT(s_NN) = 7.7, 11.5, 14.5, 19.6, 27, 39, 54.4, 200,...

  • TableC 35-36, Integral yields dN/dy of primordial antiproton

    Integral yields dN/dy of primordial antiprotons from data-driven methods

    10.17182/hepdata.133992.v1/t37

    Integral yields dN/dy of primordial antiprotons in Au+Au collisions at SQRT(s_NN) = 7.7, 11.5, 14.5, 19.6, 27, 39, 54.4, 200,...

  • TableC 33-36, dN/dy of primordial (anti)proton, 62.4 GeV

    Integral yields dN/dy of primordial protons and antiprotons from data-driven methods

    10.17182/hepdata.133992.v1/t38

    Integral yields dN/dy of primordial protons and antiprotons in Au+Au collisions at SQRT(s_NN) = 62.4, all centrality

  • TableC 37-38, Proton weak decay feed-down fraction

    Proton weak decay feed-down fraction

    10.17182/hepdata.133992.v1/t39

    Proton feed-down fraction in Au+Au collisions at SQRT(s_NN) = 7.7, 11.5, 14.5, 19.6, 27, 39, 54.4, 200, all centrality

  • TableC 39-40, Antiproton weak decay feed-down fraction

    Antiproton weak decay feed-down fraction

    10.17182/hepdata.133992.v1/t40

    Antiproton weak decay feed-down fraction in Au+Au collisions at SQRT(s_NN) = 7.7, 11.5, 14.5, 19.6, 27, 39, all centrality

  • TableC 37-40, (Anti)proton feed-down fraction, 62.4 GeV

    (Anti)proton weak decay feed-down fraction

    10.17182/hepdata.133992.v1/t41

    Protons and antiprotons weak decay feed-down fraction in Au+Au collisions at SQRT(s_NN) = 62.4, all centrality

  • TableD 41-45 7.7 GeV

    Fraction of the measured and extrapolated yield for primordial proton

    10.17182/hepdata.133992.v1/t42

    Fraction of the measured and extrapolated yield for primordial proton in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7 GeV, all centrality

  • TableD 41-45 11.5 GeV

    Fraction of the measured and extrapolated yield for primordial proton

    10.17182/hepdata.133992.v1/t43

    Fraction of the measured and extrapolated yield for primordial proton in Au+Au collisions at $\sqrt{s_{NN}}$ = 11.5 GeV, all centrality

  • TableD 41-45 14.5 GeV

    Fraction of the measured and extrapolated yield for primordial proton

    10.17182/hepdata.133992.v1/t44

    Fraction of the measured and extrapolated yield for primordial proton in Au+Au collisions at $\sqrt{s_{NN}}$ = 14.5 GeV, all centrality

  • TableD 41-45 19.6 GeV

    Fraction of the measured and extrapolated yield for primordial proton

    10.17182/hepdata.133992.v1/t45

    Fraction of the measured and extrapolated yield for primordial proton in Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6 GeV, all centrality

  • TableD 41-45 27 GeV

    Fraction of the measured and extrapolated yield for primordial proton

    10.17182/hepdata.133992.v1/t46

    Fraction of the measured and extrapolated yield for primordial proton in Au+Au collisions at $\sqrt{s_{NN}}$ = 27 GeV, all centrality

  • TableD 41-45 39 GeV

    Fraction of the measured and extrapolated yield for primordial proton

    10.17182/hepdata.133992.v1/t47

    Fraction of the measured and extrapolated yield for primordial proton in Au+Au collisions at $\sqrt{s_{NN}}$ = 39 GeV, all centrality

  • TableD 41-45 54.4 GeV

    Fraction of the measured and extrapolated yield for primordial proton

    10.17182/hepdata.133992.v1/t48

    Fraction of the measured and extrapolated yield for primordial proton in Au+Au collisions at $\sqrt{s_{NN}}$ = 54.4 GeV, all centrality

  • TableD 41-45 62.4 GeV

    Fraction of the measured and extrapolated yield for primordial proton

    10.17182/hepdata.133992.v1/t49

    Fraction of the measured and extrapolated yield for primordial proton in Au+Au collisions at $\sqrt{s_{NN}}$ = 62.4 GeV, all centrality

  • TableD 41-45 200 GeV

    Fraction of the measured and extrapolated yield for primordial proton

    10.17182/hepdata.133992.v1/t50

    Fraction of the measured and extrapolated yield for primordial proton in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV, all centrality

  • TableD 46-50 7.7 GeV

    Fraction of the measured and extrapolated yield for deuteron

    10.17182/hepdata.133992.v1/t51

    Fraction of the measured and extrapolated yield for deuteron in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7 GeV, all centrality

  • TableD 46-50 11.5 GeV

    Fraction of the measured and extrapolated yield for deuteron

    10.17182/hepdata.133992.v1/t52

    Fraction of the measured and extrapolated yield for deuteron in Au+Au collisions at $\sqrt{s_{NN}}$ = 11.5 GeV, all centrality

  • TableD 46-50 14.5 GeV

    Fraction of the measured and extrapolated yield for deuteron

    10.17182/hepdata.133992.v1/t53

    Fraction of the measured and extrapolated yield for deuteron in Au+Au collisions at $\sqrt{s_{NN}}$ = 14.5 GeV, all centrality

  • TableD 46-50 19.6 GeV

    Fraction of the measured and extrapolated yield for deuteron

    10.17182/hepdata.133992.v1/t54

    Fraction of the measured and extrapolated yield for deuteron in Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6 GeV, all centrality

  • TableD 46-50 27 GeV

    Fraction of the measured and extrapolated yield for deuteron

    10.17182/hepdata.133992.v1/t55

    Fraction of the measured and extrapolated yield for deuteron in Au+Au collisions at $\sqrt{s_{NN}}$ = 27 GeV, all centrality

  • TableD 46-50 39 GeV

    Fraction of the measured and extrapolated yield for deuteron

    10.17182/hepdata.133992.v1/t56

    Fraction of the measured and extrapolated yield for deuteron in Au+Au collisions at $\sqrt{s_{NN}}$ = 39 GeV, all centrality

  • TableD 46-50 54.4 GeV

    Fraction of the measured and extrapolated yield for deuteron

    10.17182/hepdata.133992.v1/t57

    Fraction of the measured and extrapolated yield for deuteron in Au+Au collisions at $\sqrt{s_{NN}}$ = 54.4 GeV, all centrality

  • TableD 46-50 62.4 GeV

    Fraction of the measured and extrapolated yield for deuteron

    10.17182/hepdata.133992.v1/t58

    Fraction of the measured and extrapolated yield for deuteron in Au+Au collisions at $\sqrt{s_{NN}}$ = 62.4 GeV, all centrality

  • TableD 46-50 200 GeV

    Fraction of the measured and extrapolated yield for deuteron

    10.17182/hepdata.133992.v1/t59

    Fraction of the measured and extrapolated yield for deuteron in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV, all centrality

  • TableD 51-54 7.7 GeV

    Fraction of the measured and extrapolated yield for triton

    10.17182/hepdata.133992.v1/t60

    Fraction of the measured and extrapolated yield for triton in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7 GeV, all centrality

  • TableD 51-54 11.5 GeV

    Fraction of the measured and extrapolated yield for triton

    10.17182/hepdata.133992.v1/t61

    Fraction of the measured and extrapolated yield for triton in Au+Au collisions at $\sqrt{s_{NN}}$ = 11.5 GeV, all centrality

  • TableD 51-54 14.5 GeV

    Fraction of the measured and extrapolated yield for triton

    10.17182/hepdata.133992.v1/t62

    Fraction of the measured and extrapolated yield for triton in Au+Au collisions at $\sqrt{s_{NN}}$ = 14.5 GeV, all centrality

  • TableD 51-54 19.6 GeV

    Fraction of the measured and extrapolated yield for triton

    10.17182/hepdata.133992.v1/t63

    Fraction of the measured and extrapolated yield for triton in Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6 GeV, all centrality

  • TableD 51-54 27 GeV

    Fraction of the measured and extrapolated yield for triton

    10.17182/hepdata.133992.v1/t64

    Fraction of the measured and extrapolated yield for triton in Au+Au collisions at $\sqrt{s_{NN}}$ = 27 GeV, all centrality

  • TableD 51-54 39 GeV

    Fraction of the measured and extrapolated yield for triton

    10.17182/hepdata.133992.v1/t65

    Fraction of the measured and extrapolated yield for triton in Au+Au collisions at $\sqrt{s_{NN}}$ = 39 GeV, all centrality

  • TableD 51-54 54.4 GeV

    Fraction of the measured and extrapolated yield for triton

    10.17182/hepdata.133992.v1/t66

    Fraction of the measured and extrapolated yield for triton in Au+Au collisions at $\sqrt{s_{NN}}$ = 54.4 GeV, all centrality

  • TableD 51-54 62.4 GeV

    Fraction of the measured and extrapolated yield for triton

    10.17182/hepdata.133992.v1/t67

    Fraction of the measured and extrapolated yield for triton in Au+Au collisions at $\sqrt{s_{NN}}$ = 62.4 GeV, all centrality

  • TableD 51-54 200 GeV

    Fraction of the measured and extrapolated yield for triton

    10.17182/hepdata.133992.v1/t68

    Fraction of the measured and extrapolated yield for triton in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV, all centrality

Loading Data...

Ask a Question


Your question will be emailed to those involved with the submission. Please mention the relevant table.


Please log in to HEPData to send a question.