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Armstrong, T. A.; Barish, K. N.; Batsouli, S.; Bennett, S.; Chikanian, A.; Coe, S. D.; Cormier, T. M.; Davies, R.; Dover, C.B.; Fachini, P.; Fadem, B.; Finch, E.; George, N.; Greene, S.; Haridas, P.; Hill, J. C.; Hirsch, A. S.; Hoversten, R.; Huang, H. Z.; Kumar, B. S.; Lainis, T.; Lajoie, J. G.; Lewis, R. A.; Li, Q.; Libby, Bruce; Majka, R.; Miller, T. E.; Munhoz, M. G.; Nagle, J. L.; Pless, I. A.; Pope, J.; Porile, N.; Pruneau, C.; Rabin, M. S. Z.; Reid, John D.; Rimai, A.; Rose, A.; Rotondo, F. S.; Sandweiss, J.; Scharenberg, R. P.; Slaughter, A. J.; Smith, Gerald A.; Tincknell, M.; Toothacker, W. S.; Buren, G. Van; Wohn, F. K.; Xu, Z.

doi:10.1103/physrevc.60.064903

Cited by 23 publications

(24 citation statements)

References 15 publications

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“…34. Figure 35 shows the experimentally extracted B 2 and B 3 (mainly from central collisions of these publications [170,171,172,173,174,175,176,75,76,77,78]) as a function of the centerof-mass energy in the heavy-ion collisions. One finds that the coalescence parameters are rather insensitive on the collision energy in heavy-ion collisions since all data points of B 2 lie around 10 −3 and B 3 between 10 −7 and 10 −6 .…”

Section: Recent Results Of (Anti-)nucleus Production Measurementsmentioning

confidence: 99%

Loosely-bound objects produced in nuclear collisions at the LHC

2019

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Loosely-bound objects such as light nuclei are copiously produced in proton-proton and nuclear collisions at the Large Hadron Collider (LHC), despite the fact that typical energy scales in such collisions exceed the binding energy of the objects by orders of magnitude. In this review we summarise the experimental observations, put them into context of previous studies at lower energies, and discuss the underlying physics. Most of the data discussed here were taken by the ALICE Collaboration during LHC Run1, which started in 2009 and ended in 2013. Specifically we focus on the production of (anti-)nuclei and (anti-)hypernuclei. Also included are searches for exotic objects like the H-dibaryon, a possible uuddss hexaquark state, or also a possible bound state of a Λ hyperon and a neutron. Furthermore, the study of hyperon-nucleon and hyperonhyperon interactions through measurements of correlations are briefly discussed, especially in connection with the possible existence of loosely-bound states composed of these baryons. In addition, some results in the strange and charmed hadron sector are presented, to show the capabilities for future measurements on loosely-bound objects in this direction. Finally, perspectives are given for measurements in the currently ongoing Run2 period of the LHC and in the future LHC Run3.

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Section: Recent Results Of (Anti-)nucleus Production Measurementsmentioning

confidence: 99%

Loosely-bound objects produced in nuclear collisions at the LHC

2019

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“…Since neutrons are usually not measured in high energy heavy-ion collisions experiments, except in Ref. [34], we estimate in this work the ratio R np from the measured pion yield ratio by using the relation N p /N n = (π + /π − ) 1/2 from the statistical model.…”

Section: Effects Of Density Fluctuations and Correlationsmentioning

confidence: 99%

Light nuclei production as a probe of the QCD phase diagram

et al. 2018

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It is generally believed that the quark-hadron transition at small values of baryon chemical potentials µB is a crossover but changes to a first-order phase transition with an associated critical endpoint (CEP) as µB increases. Such a µB-dependent quark-hadron transition is expected to result in a double-peak structure in the collision energy dependence of the baryon density fluctuation in heavy-ion collisions with one at lower energy due to the spinodal instability during the first-order phase transition and another at higher energy due to the critical fluctuations in the vicinity of the CEP. By analyzing the data on the p, d and 3 H yields in central heavy-ion collisions within the coalescence model for light nuclei production, we find that the relative neutron density fluctuation ∆ρn = (δρn) 2 / ρn 2 at kinetic freeze-out indeed displays a clear peak at √ sNN = 8.8 GeV and a possible strong re-enhancement at √ sNN = 4.86 GeV. Our findings thus provide a strong support for the existence of a first-order phase transition at large µB and its critical endpoint at a smaller µB in the temperature versus baryon chemical potential plane of the QCD phase diagram.

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“…It is the negative parity partner of the nucleon, they are both spin-half and isospin-half particles. The transition form factor for the production of the S 11 falls more slowly with Q 2 than the dipole form factor G D = (1 + Q 2 /0.71) −2 , at least up to Q 2 = 3.6 GeV 2 [2], and more slowly than the form factor for typical baryons. An example is the D 13 (1520) [3], which is from the same SU (6) O(3) multiplet and mass region as the S 11 (1535).…”

Section: Introductionmentioning

confidence: 89%

Electroproduction of η Mesons in the S<sub>11</sub>(1535) Resonance Region at High Momentum Transfer

Dalton

2008

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The differential cross-section for the process p(e, e ′ p)η has been measured at Q 2 ∼ 5.7 and 7.0 (GeV/c) 2 for centre-of-mass energies from threshold to 1.8 GeV, encompassing the S11(1535) resonance, which dominates the channel. This is the highest momentum transfer measurement of this exclusive process to date. The helicity-conserving transition amplitude A 1/2 , for the production of the S11(1535) resonance, is extracted from the data. Within the limited Q 2 now measured, this quantity appears to begin scaling as Q −3 -a predicted, but not definitive, signal of the dominance of perturbative QCD, at Q 2 ∼ 5 (GeV/c) 2 .

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Measurements of neutrons in11.5AGeV/cAu+

Cited by 23 publications

References 15 publications

Loosely-bound objects produced in nuclear collisions at the LHC

Loosely-bound objects produced in nuclear collisions at the LHC

Light nuclei production as a probe of the QCD phase diagram

Electroproduction of η Mesons in the S<sub>11</sub>(1535) Resonance Region at High Momentum Transfer

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