8 research outputs found
Global baryon number conservation encoded in net-proton fluctuations measured in PbâPb collisions at âsNN = 2.76 TeV
Experimental results are presented on event-by-event net-proton fluctuation measurements in PbâPb collisions at âSNN=2.76 TeV, recorded by the ALICE detector at the CERN LHC. These measurements have as their ultimate goal an experimental test of Lattice QCD (LQCD) predictions on second and higher order cumulants of net-baryon distributions to search for critical behavior near the QCD phase boundary. Before confronting them with LQCD predictions, account has to be taken of correlations stemming from baryon number conservation as well as fluctuations of participating nucleons. Both effects influence the experimental measurements and are usually not considered in theoretical calculations. For the first time, it is shown that event-by-event baryon number conservation leads to subtle long-range correlations arising from very early interactions in the collisions.publishedVersio
Multiplicity dependence of K*(892)(0) and phi(1020) production in pp collisions at root s=13 TeV
The striking similarities that have been observed between
high-multiplicity proton-proton (pp) collisions and heavy-ion collisions
can be explored through multiplicity-differential measurements of
identified hadrons in pp collisions. With these measurements, it is
possible to study mechanisms such as collective flow that determine the
shapes of hadron transverse momentum (p(T)) spectra, to search for
possible modifications of the yields of short-lived hadronic resonances
due to scattering effects in an extended hadron-gas phase, and to
investigate different explanations provided by phenomenological models
for enhancement of strangeness production with increasing multiplicity.
In this paper, these topics are addressed through measurements of the
K* (892)(0) and phi(1020) mesons at midrapidity in pp collisions at
root s = 13 TeV as a function of the charged-particle multiplicity. The
results include the p(T) spectra, p(T)-integrated yields, mean
transverse momenta, and the ratios of the yields of these resonances to
those of longer-lived hadrons. Comparisons with results from other
collision systems and energies, as well as predictions from
phenomenological models, are also discussed. (C) 2020 European
Organization for Nuclear Research. Published by Elsevier B.V
Global baryon number conservation encoded in net-proton fluctuations measured in Pb-Pb collisions at root s(NN)=2.76TeV
Experimental results are presented on event-by-event net-proton
fluctuation measurements in Pb-Pb collisions at root s(NN)= 2.76 TeV,
recorded by the ALICE detector at the CERN LHC. These measurements have
as their ultimate goal an experimental test of Lattice QCD (LQCD)
predictions on second and higher order cumulants of net-baryon
distributions to search for critical behavior near the QCD phase
boundary. Before confronting them with LQCD predictions, account has to
be taken of correlations stemming from baryon number conservation as
well as fluctuations of participating nucleons. Both effects influence
the experimental measurements and are usually not considered in
theoretical calculations. For the first time, it is shown that event-
by-event baryon number conservation leads to subtle long-range
correlations arising from very early interactions in the collisions. (C)
2020 European Organization for Nuclear Research. Published by Elsevier
B.V
Global baryon number conservation encoded in net-proton fluctuations measured in PbâPb collisions at âsNN = 2.76 TeV
Experimental results are presented on event-by-event net-proton fluctuation measurements in PbâPb collisions at âSNN=2.76 TeV, recorded by the ALICE detector at the CERN LHC. These measurements have as their ultimate goal an experimental test of Lattice QCD (LQCD) predictions on second and higher order cumulants of net-baryon distributions to search for critical behavior near the QCD phase boundary. Before confronting them with LQCD predictions, account has to be taken of correlations stemming from baryon number conservation as well as fluctuations of participating nucleons. Both effects influence the experimental measurements and are usually not considered in theoretical calculations. For the first time, it is shown that event-by-event baryon number conservation leads to subtle long-range correlations arising from very early interactions in the collisions
Multiplicity dependence of K*(892)(0) and phi(1020) production in pp collisions at root s=13 TeV
The striking similarities that have been observed between high-multiplicity proton-proton (pp) collisions and heavy-ion collisions can be explored through multiplicity-differential measurements of identified hadrons in pp collisions. With these measurements, it is possible to study mechanisms such as collective flow that determine the shapes of hadron transverse momentum (pT) spectra, to search for possible modifications of the yields of short-lived hadronic resonances due to scattering effects in an extended hadron-gas phase, and to investigate different explanations provided by phenomenological models for enhancement of strangeness production with increasing multiplicity. In this paper, these topics are addressed through measurements of the K\u204e(892)0 and \u3d5(1020) mesons at midrapidity in pp collisions at s= 13 TeV as a function of the charged-particle multiplicity. The results include the pT spectra, pT-integrated yields, mean transverse momenta, and the ratios of the yields of these resonances to those of longer-lived hadrons. Comparisons with results from other collision systems and energies, as well as predictions from phenomenological models, are also discussed
Multiplicity dependence of K*(892)(0) and phi(1020) production in pp collisions at root s=13 TeV
none1003siThe striking similarities that have been observed between high-multiplicity proton-proton (pp) collisions and heavy-ion collisions can be explored through multiplicity-differential measurements of identified hadrons in pp collisions. With these measurements, it is possible to study mechanisms such as collective flow that determine the shapes of hadron transverse momentum (p(T)) spectra, to search for possible modifications of the yields of short-lived hadronic resonances due to scattering effects in an extended hadron-gas phase, and to investigate different explanations provided by phenomenological models for enhancement of strangeness production with increasing multiplicity. In this paper, these topics are addressed through measurements of the K* (892)(0) and phi(1020) mesons at midrapidity in pp collisions at root s = 13 TeV as a function of the charged-particle multiplicity. The results include the p(T) spectra, p(T)-integrated yields, mean transverse momenta, and the ratios of the yields of these resonances to those of longer-lived hadrons. Comparisons with results from other collision systems and energies, as well as predictions from phenomenological models, are also discussed. (C) 2020 European Organization for Nuclear Research. Published by Elsevier B.V.noneAcharya, S.; Adamova, D.; Adler, A.; Adolfsson, J.; Aggarwal, M. M.; Rinella, G. Aglieri; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, S.; Ahn, S. U.; Akindinov, A.; Al-Turany, M.; Alam, S. N.; Albuquerque, D. S. D.; Aleksandrov, D.; Alessandro, B.; Alfanda, H. M.; Alfaro Molina, R.; Ali, B.; Ali, Y.; Alici, A.; Alkin, A.; Alme, J.; Alt, T.; Altenkamper, L.; Altsybeev, I; Anaam, M. N.; Andrei, C.; Andreou, D.; Andrews, H. A.; Andronic, A.; Angeletti, M.; Anguelov, V; Anson, C.; Ci, T. 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Global baryon number conservation encoded in net-proton fluctuations measured in PbâPb collisions at âsNN=2.76 TeV
Experimental results are presented on event-by-event net-proton fluctuation measurements in PbâPb collisions at âsNN = 2.76 TeV, recorded by the ALICE detector at the CERN LHC. These measurements have as their ultimate goal an experimental test of Lattice QCD (LQCD) predictions on second and higher order cumulants of net-baryon distributions to search for critical behavior near the QCD phase boundary. Before confronting them with LQCD predictions, account has to be taken of correlations stemming from baryon number conservation as well as fluctuations of participating nucleons. Both effects influence the experimental measurements and are usually not considered in theoretical calculations. For the first time, it is shown that event-by-event baryon number conservation leads to subtle long-range correlations arising from very early interactions in the collisions
Global baryon number conservation encoded in net-proton fluctuations measured in Pb-Pb collisions at root s(NN)=2.76TeV
Experimental results are presented on event-by-event net-proton fluctuation measurements in PbâPb collisions at sNN=2.76 TeV, recorded by the ALICE detector at the CERN LHC. These measurements have as their ultimate goal an experimental test of Lattice QCD (LQCD) predictions on second and higher order cumulants of net-baryon distributions to search for critical behavior near the QCD phase boundary. Before confronting them with LQCD predictions, account has to be taken of correlations stemming from baryon number conservation as well as fluctuations of participating nucleons. Both effects influence the experimental measurements and are usually not considered in theoretical calculations. For the first time, it is shown that event-by-event baryon number conservation leads to subtle long-range correlations arising from very early interactions in the collisions