Study of QGP signatures with the ϕ → K + K – signal in Pb-Pb ALICE events

• Published in: The European physical journal. C, Particles and fields Vol. 45; no. 3; pp. 669 - 677
• Main Authors: Akindinov, A., Alici, A., Antonioli, P., Arcelli, S., Basile, M., Romeo, G. Cara, Chumakov, M., Cifarelli, L., Cindolo, F., Caro, A. De, Gruttola, D. De, Pasquale, S. De, Bartolomeo, A. Di, Girard, M. Fusco, Grishuk, Yu, Guarnaccia, C., Guida, M., Hatzifotiadou, D., Kim, D. W., Kim, J. S., Kiselev, S., Laurenti, G., Lee, K., Lee, S. C., Lyublev, Ye, Luvisetto, M. L., Mal'kevich, D., Margotti, A., Martemiyanov, A., Mikhin, K., Nania, R., Noferini, F., Pesci, A., Ryabinin, M., Scapparone, E., Scioli, G., Selivanov, A., Sellitto, S., Silvestri, R., Smirnitskiy, A., Sun, Y., Valenti, G., Vetlitskiy, I., Voloshin, K., Vorobiev, L., Williams, M. C. S., Yakorev, D., Zagreev, B., Zampolli, C., Zichichi, A.
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer Nature B.V 01.03.2006
• Subjects: Collisions; Gluons; Large Hadron Collider; Quark-gluon plasma; Quarks; Radiometric dating; Signatures
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s2005-02446-y

The ϕ → K+K– decay channel in Pb-Pb collisions at LHC is studied through a full simulation of the ALICE detector. The study focuses on possible signatures in this channel of quark-gluon plasma (QGP) formation. On a basis of 106 collisions at high centrality some proposed QGP signatures are clearly visible both in K + K– invariant mass and transverse mass distributions. The high significance of this observation appears to reside heavily on the use of the TOF (Time Of Flight) system of ALICE in addition to its central tracking detectors.