Naslov
3. Hadronic resonance production in d plus Au collisions at s(NN)=200 GeV measured at the BNL Relativistic Heavy Ion Collider

Autori
Abelev, B.I. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; et al. (the STAR Collaboration)

Izvornik
Physical Review C - Nuclear Physics (0556-2813) 78 (2008), 4; 044906-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
masses and widths of these resonances

Sažetak
We present the first measurements of the $\rho(770)^0$, $K^*$(892), $\Delta$(1232)$^{; ; ++}; ; $, $\Sigma$(1385), and $\Lambda$(1520) resonances in $d$+Au collisions at $\sqrt{; ; s_{; ; _{; ; NN}; ; }; ; }; ; $ = 200 GeV, reconstructed via their hadronic decay channels using the STAR detector at RHIC. The masses and widths of these resonances are studied as a function of transverse momentum ($p_T$). We observe that the resonance spectra follow a generalized scaling law with the transverse mass ($m_T$). The $<p_T>$ of resonances in minimum bias collisions is compared to the $<p_T>$ of $\pi$, $K$, and $\bar{; ; p}; ; $. The $\rho^0/\pi^-$, $K^*/K^-$, $\Delta^{; ; ++}; ; /p$, $\Sigma(1385)/\Lambda$, and $\Lambda(1520)/\Lambda$ ratios in $d$+Au collisions are compared to the measurements in minimum bias $p+p$ interactions, where we observe that both measurements are comparable. The nuclear modification factors ($R_{; ; dAu}; ; $) of the $\rho^0$, $K^*$, and $\Sigma^*$ scale with the number of binary collisions ($N_{; ; bin}; ; $) for $p_T >$ 1.2 GeV/$c$.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
Art. no. 044906.

POVEZANOST RADA