Feynman- x and transverse-momentum dependence of D sup + and D sup 0 , D sup 0 production in 250 GeV. pi. sup minus -nucleon interactions

Journal Article · Mon Nov 30 04:00:00 EST 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.3147· OSTI ID:7030060

Alves, G A; Amato, S; Anjos, J C; Appel, J A; Bracker, S B; Cremaldi, L M; Darling, C L; Dixon, R L; Errede, D; Fenker, H C; Gay, C; Green, D R; Jedicke, R; Kaplan, D; Karchin, P E; Kwan, S; Leedom, I; Lueking, L H; Luste, G J; Mantsch, P M ; de Mello Neto, J R.T.; Metheny, J; Milburn, R H; de Miranda, J M; da Motta Filho, H; Napier, A; d'Olivera, A B; Rafatian, A; dos Reis, A C; Reucroft, S; Ross, W R; Santoro, A F.S.; Sheaff, M; Souza, M H.G.; Spalding, W J; Stoughton, C; Streetman, M E; Summers, D J; Takach, S F; Wu, Z ^[1]

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1. Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro (Brazil) Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States) University of Mississippi, Oxford, Mississippi 38677 (United States) Northeastern University, Boston, Massachusetts 02115 (United States) University of Toronto, Toronto, Ontario, M5S 1A7 (Canada) Tufts University, Medford, Massachusetts 02155 (United States) University of Wisconsin, Madison

We measure the differential cross section with respect to Feynman-{ital x} ({ital x}{sub {ital F}}) and transverse momentum ({ital P}{sub {ital T}}) for charm meson production using targets of Be, Al, Cu, and W. In the range 0.1{lt}{ital x}{sub {ital F}}{lt}0.7, {ital d}{sigma}/{ital dx}{sub {ital F}} is well fit by the form (1{minus}{ital x}{sub {ital F}}){sup {ital n}} with {ital n}=3.9{plus minus}0.3. The difference between {ital n} values for {ital D}{sup {minus}} and {ital D}{sup +} is 1.1{plus minus}0.7. However, we find an asymmetry of 0.18{plus minus}0.06 favoring the production of {ital D}{sup {minus}} compared to {ital D}{sup +}. In the lower {ital P}{sub {ital T}} range, {lt}2 GeV, {ital d}{sigma}/{ital dP}{sub {ital T}}{sup 2} is well fit by the form exp({minus}{ital b}{times}{ital P}{sub {ital T}}{sup 2}) with {ital b}=1.03{plus minus}0.06 GeV{sup {minus}2}, while in the higher {ital P}{sub {ital T}} range, 0.8 to 3.6 GeV, it is well fit by the form exp({minus}{ital b}{prime}{times}{ital P}{sub {ital T}}) with {ital b}{prime}=2.76{plus minus}0.08 GeV{sup {minus}1}. The shape of the differential cross section has no significant dependence on atomic mass of the target material.

• OSTI ID: 7030060
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 69:22; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662340* -- Hadron Interactions-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALKALINE EARTH METALS
ALUMINIUM
BERYLLIUM
BOSONS
CHARM PARTICLES
CHARMED MESONS
COPPER
CROSS SECTIONS
D MESONS
DATA
DECAY
DIFFERENTIAL CROSS SECTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
FIELD THEORIES
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
HADRONIC PARTICLE DECAY
HADRONS
INFORMATION
INTERACTIONS
KAONS
LINEAR MOMENTUM
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
METALS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PION-NUCLEON INTERACTIONS
PIONS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
STRANGE MESONS
STRANGE PARTICLES
TRANSITION ELEMENTS
TRANSVERSE MOMENTUM
TUNGSTEN