Quark Matter 2014 - XXIV International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

On the pair correlations of neutral K,D,B and Bs mesons with close momenta produced in inclusive multiparticle processes

20 May 2014, 16:30

2h

spectrum (darmstadtium)

Board: I-21

Poster Correlations and Fluctuations Poster session

Speaker

Dr Valery Lyuboshitz (Joint Institute for Nuclear Research ( Dubna ))

Description

The comparative theoretical analysis of pair correlations of two neutral $K$ mesons and two neutral heavy mesons ( $D,B,B_s$ ), generated in inclusive processes -- hadron-hadron, hadron--nucleus and nucleus--nucleus collisions -- with strangeness and charm ( beauty ) conservation, is performed . For $K^0$ mesons, relations describing the dependence of the correlations of two short-lived and two long-lived neutral kaons and the correlations of "mixed" pairs $K_S^0{K}_L^0$ at small relative momenta upon the space-time parameters of the generation region of $K^0$ and ${\overline{K}}^0$ mesons have been obtained. It is shown that under the strangeness conservation the correlation functions of the pairs $K_S^0{K}_S^0$ and $K_L^0{K}_L^0$, produced in the same inclusive process, coincide, and the difference between the correlation functions of the pairs $K_S^0{K}_S^0$ and $K_S^0{K}_L^0$ is conditioned exclusively by the production of the pairs of non-identical neutral kaons $K^0{\overline{K}}^0$. For the case of $D^0$, $B^0$ and $B_s^0$ mesons, correlations have the quite analogous character and they are described by quite similar expressions: in particular, just as for $K^0$ mesons, the correlation functions for the pairs of states with the same $CP$ parity ( $R_{SS}=R_{LL}$ ) and for the pairs of states with different $CP$ parity ( $R_{SL}$ ) do not coincide, and the difference between them is conditioned exclusively by the production of the pairs $D^0{\overline{D}}^0,B^0{\overline{B}}^0,B_s^0{\overline{B}}_s^0$. However, contrary to the case of $K^0$ mesons, here the distinction of $CP$-even and $CP$-odd states encounters difficulties -- due to the insignificant differences of their lifetimes and the relatively small probability of purely $CP$-even and $CP$-odd decay channels, and one may hope that it will become possible at future colliders .

Presentation materials

Slides

Quark_Matter_2014--Valery_Lyuboshitz_2.pdf