Multiplicity dependence of light-flavor hadron production in pp collisions at s=7TeV

Abstract

Comprehensive results on the production of unidentified charged particles, π

Tsallis-thermometer: a QGP indicator for large and small collisional systems

“…In table A2 the investigated yields with various multiplicity classes are enumerated. In order to make a meaningful comparison of the results, the centrality dependent data were converted into multiplicity classes where needed [82,83]. The conversions were performed according to Glauber model calculations that are detailed in the cited experimental papers.…”

The onset of ΛΛ hypernuclear binding

“…Extending the / πEFT baryonic Lagrangian from nuclei and single-Λ hypernuclei to multi-Λ hypernuclei requires one ΛΛ and one ΛΛN new interaction terms. Here we fit the needed ΛΛ contact term to a ΛΛ scattering length value spanning a range of values suggested by recent analyses of ΛΛ correlations observed in relativistic heavyion collisions [30][31][32]. For each choice we fix a ΛΛN three-body contact term promoted to LO by fitting to ∆B ΛΛ ( 6 ΛΛ He)=B ΛΛ ( 6 ΛΛ He)−2B Λ ( 5 Λ He)=0.67±0.17 MeV.…”

“…3. Several representative values of the ΛΛ scattering length were used: a ΛΛ =−0.5, −0.8, −1.9 fm, spanning a broad range of values suggested by analyses of ΛΛ correlations observed recently in relativistic heavy-ion collisions [30][31][32] and by analyzing the KEK-PS E522 [38] invariant mass spectrum in the reaction 12 C(K − , K + )ΛΛX near the ΛΛ threshold [39]. Again, the choice of a ΛΛ determines the one ΛΛ LEC required at LO, while the ΛΛN LEC was fitted to the ∆B ΛΛ ( 6 ΛΛ He)=0.67±0.17 MeV datum.…”

Temperature and fluid velocity on the freeze-out surface from π , K , and p spectra in pp , Mazeliauskas1, Vislavicius2 2020Phys. Rev. C

“…Results.-The data considered in this work has been published by the ALICE Collaboration [36] and includes π, K and p spectra measured as a function of centrality and multiplicity in pp collisions at √ s = 7 TeV [37], p-Pb collisions at √ s NN = 5.02 TeV [38] and Pb-Pb collisions at √ s NN = 2.76 TeV [14]. The blast-wave model parameters are extracted by simultaneously fitting the π, K, p spectra in the transverse momentum range 0.5 < p T < 3.0 (GeV/c), where each data point is considered with a weight given by the statistical and systematic uncertainties summed in quadrature.…”