Speaker
Kefeng Xin
Description
In ultrarelativistic heavy-ion collisions, due to the high particle multiplicities, a produced muon can be bound to a charged hadron (proton, antiproton, $K^{+}$, $K^{-}$, $\pi^{+}$, $\pi^{-}$) by Coulomb force and form a hydrogen-like atom. Muon identification at low transverse momentum from the Time-of-Flight detector and the Time Projection Chamber provides STAR a great opportunity to search for a variety of muonic atoms. Muonic atoms are an ideal tool, as suggested by Mel Schwartz, Jack Sandweiss
and the authors of [1] [2], to measure the thermal emission from
the Quark-Gluon Plasma via a direct measurement of the single muon spectrum because only thermal muons or muons from short-lived resonance decays are capable of forming such atoms. We will present the analysis on the $\sqrt{s_{NN}}=200$ GeV Au+Au collisions collected by the STAR experiment at RHIC. Various methods and techniques will be shown to demonstrate the validity of search results.
[1] Gordon Baym, Gerald Friedman, R. J. Hughes and Barbara V. Jacak, Phys. Rev. D 49, 4 (1993).
[2] Joseph Kapusta and and Agnes Mocsy, Phys. Rev. C 59, 5, (1999).
| On behalf of collaboration: | STAR |
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Author
Kefeng Xin
