6533b85dfe1ef96bd12bdc01
RESEARCH PRODUCT
Study ofππcorrelations at LHC and RHIC energies inppcollisions within the quark-gluon string model
L. V. MalininaE. E. ZabrodinM. S. NilssonJ. BleibelL. V. Bravinasubject
PhysicsQuarkNuclear physicsNuclear and High Energy PhysicsParticle physicsPionLarge Hadron ColliderMonte Carlo methodHigh Energy Physics::ExperimentMultiplicity (chemistry)Nuclear ExperimentNuclear theoryGluondescription
The quark-gluon string model reproduces well the global characteristics of the $pp$ collisions at energies of $\sqrt{s}=200\text{ }\text{ }\mathrm{GeV}$ (RHIC) and $\sqrt{s}=900\text{ }\text{ }\mathrm{GeV}$ (LHC). In present paper the quark-gluon string model is employed for the description of femtoscopic characteristics of identical pions produced in the aforementioned reactions. The study is concentrated on the low multiplicity and multiplicity averaged events, where no collective effects are expected. The different procedures for fitting the one-dimensional correlation functions of pions are studied and compared with the space-time distributions extracted directly from the model. Particularly, it is shown that the double-Gaussian fit reveals the contributions coming separately from resonances and from directly produced particles. The comparison of model results with the experimental data favors a decrease in particle formation time with rising collision energy.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-09-12 | Physical Review D |