Hadronic resonance production in d+Au collisions at root S(NN) = 200 GeV measured at the BNL Relativistic Heavy Ion Collider
2008
We present the first measurements of the {rho}(770){sup 0},K*(892),{delta}(1232){sup ++},{sigma}(1385), and {lambda}(1520) resonances in d+Au collisions at {radical}(s{sub NN})=200 GeV, reconstructed via their hadronic decay channels using the STAR detector (the solenoidal tracker at the BNL Relativistic Heavy Ion Collider). The masses and widths of these resonances are studied as a function of transverse momentum p{sub T}. We observe that the resonance spectra follow a generalized scaling law with the transverse mass m{sub T}. The of resonances in minimum bias collisions are compared with the of {pi},K, and p. The {rho}{sup 0}/{pi}{sup -},K*/K{sup -},{delta}{sup ++}/p,{sigma}(1385)/{lambda}, and {lambda}(1520)/{lambda} ratios in d+Au collisions are compared with the measurements in minimum bias p+p interactions, where we observe that both measurements are comparable. The nuclear modification factors (R{sub dAu}) of the {rho}{sup 0},K*, and {sigma}* scale with the number of binary collisions (N{sub bin}) for p{sub T}> 1.2 GeV/c.
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