Bottom photoproduction measured using decays into muons in dijet events in ep collisions at [Formula Presented]
Chekanov S., Derrick M., Krakauer D., Loizides JH., Magill S., Miglioranzi S., Musgrave B., Repond J., Yoshida R., Mattingly MCK., Antonioli P., Bari G., Basile M., Bellagamba L., Boscherini D., Bruni A., Bruni G., Romeo GC., Cifarelli L., Cindolo F., Contin A., Corradi M., Pasquale S., Giusti P., Iacobucci G., Margotti A., Montanari A., Nania R., Palmonari F., Pesci A., Sartorelli G., Zichichi A., Aghuzumtsyan G., Bartsch D., Brock I., Goers S., Hartmann H., Hilger E., Irrgang P., Jakob H., Kind O., Meyer U., Paul E., Rautenberg J., Renner R., Stifutkin A., Tandler J., Voss KC., Wang M., Weber A., Bailey DS., Brook NH., Cole JE., Heath GP., Namsoo T., Robins S., Wing M., Capua M., Mastroberardino A., Schioppa M., Susinno G., Kim JY., Kim YK., Lee JH., Lim IT., Pac MY., Caldwell A., Helbich M., Liu X., Mellado B., Ning Y., Paganis S., Ren Z., Schmidke WB., Sciulli F., Chwastowski J., Eskreys A., Figiel J., Galas A., Olkiewicz K., Stopa P., Zawiejski L., Adamczyk L., Bołd T., Grabowska-Bołd I., Kisielewska D., Kowal AM., Kowal M., Kowalski T., Przybycień M., Suszycki L., Szuba D., Szuba J., Kotański A., Słomiński W., Adler V., Behrens U., Bloch I., Borras K., Chiochia V.
The photoproduction of bottom quarks in events with two jets and a muon has been measured with the ZEUS detector at HERA using an integrated luminosity of 110 [Formula Presented]. The fraction of jets containing b quarks was extracted from the transverse momentum distribution of the muon relative to the closest jet. Differential cross sections for bottom production as a function of the transverse momentum and pseudorapidity of the muon, of the associated jet and of [Formula Presented] the fraction of the photon’s momentum participating in the hard process, are compared with MC models and QCD predictions made at next-to-leading order. The latter give a good description of the data. © 2004 The American Physical Society.