Evidence of rescattering effect in Pb-Pb collisions at the LHC through production of K*(892)(0) and phi(1020) mesons

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00523798" target="_blank" >RIV/61389005:_____/20:00523798 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/20:00523798 RIV/68407700:21340/20:00342814

Result on the web

<a href="https://doi.org/10.1016/j.physletb.2020.135225" target="_blank" >https://doi.org/10.1016/j.physletb.2020.135225</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2020.135225" target="_blank" >10.1016/j.physletb.2020.135225</a>

Result language

angličtina

Original language name

Evidence of rescattering effect in Pb-Pb collisions at the LHC through production of K*(892)(0) and phi(1020) mesons

Original language description

Measurements of K*(892)(0) and phi(1020) resonance production in Pb-Pb and pp collisions at root s(NN) = 5.02 TeV with the ALICE detector at the Large Hadron Collider are reported. The resonances are measured at midrapidity (vertical bar y vertical bar < 0.5) via their hadronic decay channels and the transverse momentum (p(T)) distributions are obtained for various collision centrality classes up to p(T) = 20 GeV/c. The p(T)-integrated yield ratio K*(892)(0)/K in Pb-Pb collisions shows significant suppression relative to pp collisions and decreases towards more central collisions. In contrast, the phi(1020)/K ratio does not show any suppression. Furthermore, the measured K*(892)(0)/K ratio in central Pb-Pb collisions is significantly suppressed with respect to the expectations based on a thermal model calculation, while the phi(1020)/K ratio agrees with the model prediction. These measurements are an experimental demonstration of rescattering of K*(892)(0) decay products in the hadronic phase of the collisions. The K*(892)(0)/K yield ratios in Pb-Pb and pp collisions are used to estimate the time duration between chemical and kinetic freeze-out, which is found to be similar to 4-7 fm/c for central collisions. The p(T)-differential ratios of K*(892)(0)/K, phi(1020)/K, K*(892)(0)/pi, phi(1020)/pi, p/K*(892)(0) and p/phi(1020) are also presented for Pb-Pb and pp collisions at root s(NN) = 5.02 TeV. These ratios show that the rescattering effect is predominantly a low-p(T) phenomenon.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10304 - Nuclear physics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physics Letters. B

ISSN

0370-2693

e-ISSN

—

Volume of the periodical

802

Issue of the periodical within the volume

3

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

14

Pages from-to

135225

UT code for WoS article

000515091400024

EID of the result in the Scopus database

2-s2.0-85078082421