Naslov
Measurement of D* Mesons in Jets from p+p Collisions at s**(1/2) = 200-GeV

Autori
Abelev, B.I. ; ... Planinić, Mirko ; Poljak, Nikola ; ...

Izvornik
Physical Review D - Particles, Fields, Gravitation, and Cosmology (1550-7998) 79 (2009), 11; 112006-1

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

Ključne riječi
gluon; splitting; perturbation theroy; RHIC

Sažetak
We report the measurement of charged $D^*$ mesons in inclusive jets produced in proton-proton collisions at a center of mass energy $\sqrt{; ; ; s}; ; ; $ = 200 GeV with the STAR experiment at RHIC. For $D^{; ; ; *}; ; ; $ mesons with fractional momenta $0.2 < z < 0.5$ in inclusive jets with 11.5 GeV mean transverse energy, the production rate is found to be $N(D^{; ; ; *+}; ; ; +D^{; ; ; *-}; ; ; )/N(\mathrm{; ; ; jet}; ; ; ) = 0.015 \pm 0.008 (\mathrm{; ; ; stat}; ; ; ) \pm 0.007 (\mathrm{; ; ; sys}; ; ; )$. This rate is consistent with perturbative QCD evaluation of gluon splitting into a pair of charm quarks and subsequent hadronization.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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