Production of {omega} mesons at large transverse momenta in p+p and d+Au collisions at {radical}(s{sub NN})=200 GeV

Journal Article · Tue May 15 00:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.051902· OSTI ID:20995259

Adler, S S; Aronson, S H; Chujo, T; David, G; Desmond, E J; Franz, A; Haggerty, J S; Harvey, M; Johnson, B M; Kistenev, E; Kroon, P J; Makdisi, Y I; Mioduszewski, S; Mitchell, J T; Morrison, D P; O'Brien, E; Pinkenburg, C; Pisani, R P; Purschke, M L; Shea, T K ^[1]

---

1. Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)

The PHENIX experiment at RHIC has measured the invariant cross section for {omega}-meson production at midrapidity in the transverse momentum range 2.5<p{sub T}<9.25 GeV/c in p+p and d+Au collisions at {radical}(s{sub NN})=200 GeV. Measurements in two decay channels ({omega}{yields}{pi}{sup 0}{pi}{sup +}{pi}{sup -} and {omega}{yields}{pi}{sup 0}{gamma}) yield consistent results, and the reconstructed {omega} mass agrees with the accepted value within the p{sub T} range of the measurements. The {omega}/{pi}{sup 0} ratio is found to be 0.85{+-}0.05{sup stat}{+-}0.09{sup sys} in p+p and 0.94{+-}0.08{sup stat}{+-}0.12{sup sys} in d+Au collisions, independent of p{sub T}. The nuclear modification factor R{sub dA}{sup {omega}} is 1.03{+-}0.12{sup stat}{+-}0.21{sup sys} and 0.83{+-}0.21{sup stat}{+-}0.17{sup sys} in minimum bias and central (0-20%) d+Au collisions, respectively.

• OSTI ID: 20995259
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 75, Issue 5; Other Information: DOI: 10.1103/PhysRevC.75.051902; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BROOKHAVEN RHIC
COLLISIONS
CROSS SECTIONS
GEV RANGE
OMEGA BARYONS
PARTICLE PRODUCTION
PIONS MINUS
PIONS NEUTRAL
TRANSVERSE MOMENTUM