8 research outputs found
LONGITUDINAL DISTRIBUTION OF pi+-, K+-, PROTONS AND ANTI-PROTONS PRODUCED IN 360-GeV/c pi- p INTERACTIONS
Results on the longitudinal-momentum distributions of Ï<SUP>±</SUP>, K<SUP>±</SUP>, protons and antiprotons produced in 360 GeV/c p- interactions are presented. They are compared with other available data and discussed in terms of Ï-fragmentation
NEUTRAL D MESON PROPERTIES IN 360-GeV/c pi- p INTERACTIONS
Based on a sample of 22 four-prong D<SUP>0</SUP>/D<SUP>-0</SUP>/ decays produced in hydrogen by 360 GeV/cÏâ, we present the following new results: mean lifetime Ï = (3.5<SUP>+1.4</SUP><SUB>-0.9</SUB>x 10<SUP>-13</SUP>s; production cross section for x<SUB>F</SUB>> 0.0, Ï = (10.3 ± 3.5) Ïb; the D â K<SUP>± </SUP>Ï<SUP>± </SUP>Ï<SUP>-</SUP>Ï<SUP>-</SUP>branching ratio = (7.1 ± 2.5)%
INCLUSIVE PROPERTIES OF D MESONS PRODUCED IN 360-GeV pi- p INTERACTIONS
The inclusive cross sections for forward D meson production at âs = 26 Gev in Ï-p interactions have been measured to be: Ï(ÏÌ
pâD<SUP>0</SUP>/D<SUP>â0</SUP>)X<SUB>F</SUB>>0 = (10.1±2.2) ÎŒb, Ï(ÏÌ
pâD<SUP>±</SUP> + X)X<SUB>F</SUB>>0 = (5.7±1.6) ÎŒb . The distribution in X<SUB>F</SUB>for all D and for X<SUB>F</SUB> > 0 has the form dÏ/dX<SUB>F</SUB> = 107<SUP>+39</SUP><SUB>-37</SUB>(1-X<SUB>F</SUB>)7.5<SUP>+2.5</SUP><SUB>-1.7</SUB> + 5.4<SUP>+6.0</SUP><SUB>-3.8</SUB>(1-X<SUB>F</SUB>)0.7<SUP>1.0</SUP><SUB>-0.7</SUB>ÎŒb, with evidence for leading D production. The P<SUP>2</SUP><SUB>T</SUB> distribution is exponential with slope parameter [â1.18<SUP>+0.18</SUP><SUB>â0.16</SUB>](GeV/c)<SUP>â2</SUP>. The data are compared with predictions from first-order quark/gluon fusion calculations