Measurement of open charm production in two-photon processes with detection of electron-inclusive events

M Sakuda,S Odaka,K Amako,T Yamagata,H Takaki,F Takasaki,Y Nakagawa,T Kondo,K Tobimatsu,J Kanzaki,Y Watase,N Tamura,H Kurashige,M Shirakata,T Ohsugi,F Yabuki,T Sumiyoshi,Y Yamada,J Shirai,M Fukawa,N Ishihara,K Ogawa,R Kikuchi,A Ono,K Abe,Y Nagashima,I Nakano,E K Matsuda,T Ohama,M Chiba,M Daigo,J Macnaughton,A Kr�Ger,Y Fukushima,Y Homma,S Uehara,F Hinode,T Nakamura,Y Arai,Y Asano,M Utsumi,K Miyake,H Sakamoto,A Suzuki,H Hanai,Y Iwata,M Higuchi,M Takita,J Haba,M Shioden,T Tsuboyama,H Ohyama,N Hosoda,Y Hemmi,T Hirose,Y Unno,Yoshihisa Takada ,Shigeki Mori ,Nobuyuki Kanematsu ,Takashi Oyama ,Makoto Miura ,Takahiro Arima ,Nobuaki Sato ,Atsushi Okamoto ,Yūzō Yamamoto ,T Korhonen ,Minoru Sato ,Yasushige Yonezawa ,Nobuyuki Kanda ,Yasuo Chiba ,Takayuki Matsui ,Hajime Yoshida

doi:10.1007/bf01411012

Abstract

Experimental studies of open charm production in two-photon processes have been performed. In the measurement, charmed hadrons were identified by electrons from their semi-leptonic decays. The result was compared with calculations based on the direct process and photon-gluon fusion process by resolved photons. We found that the effect of the gluon component in a photon is substantial in the observed events.

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