The production rate of Bs0 mesons relative to B0 mesons is measured by the LHCb experiment in pp collisions at a center-of-mass energy √s=13 TeV over the forward rapidity interval 2<4.5 as a function of the charged particle multiplicity measured in the event. Evidence at the 3.4 σ level is found for an increase of the ratio of Bs0 to B0 cross sections with multiplicity at transverse momenta below 6 GeV/c, with no significant multiplicity dependence at higher transverse momentum. Comparison with data from e+e− collisions implies that the density of the hadronic medium may affect the production rates of B mesons. This is qualitatively consistent with the emergence of quark coalescence as an additional hadronization mechanism in high-multiplicity collisions.
Evidence for Modification of b Quark Hadronization in High-Multiplicity pp Collisions at s =13 TeV
Capriotti, L.;
2023
Abstract
The production rate of Bs0 mesons relative to B0 mesons is measured by the LHCb experiment in pp collisions at a center-of-mass energy √s=13 TeV over the forward rapidity interval 2<4.5 as a function of the charged particle multiplicity measured in the event. Evidence at the 3.4 σ level is found for an increase of the ratio of Bs0 to B0 cross sections with multiplicity at transverse momenta below 6 GeV/c, with no significant multiplicity dependence at higher transverse momentum. Comparison with data from e+e− collisions implies that the density of the hadronic medium may affect the production rates of B mesons. This is qualitatively consistent with the emergence of quark coalescence as an additional hadronization mechanism in high-multiplicity collisions.| File | Dimensione | Formato | |
|---|---|---|---|
|
PhysRevLett.131.061901.pdf
accesso aperto
Tipologia:
Published (Publisher's Version of Record)
Licenza:
Creative commons
Dimensione
645.03 kB
Formato
Adobe PDF
|
645.03 kB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.




