Published December 5, 1985
| Version v1
Journal article
Direct photon pair production from pions and protons at 200 GeV/c
Creators
- Badier, J.1
- Bienvenu, H.1
- Bourotte, J.1
- Karyotakis, Y.1
- Pare, E.1
- Bardadin-Otwinowska, M.2, 3
- Michelini, A.3
- Rahal-Callot, G.3
- Boucrot, J.2
- Callot, O.2
- Cohen, M.2
- Decamp, D.2
- Moniez, M.2
- Bemporad, C.4
- Cnops, A.M.4, 5
- Costantini, F.4, 5
- Giannini, G.R.4, 5
- Lariccia, P.4, 5
- Detoeuf, J.F.6
- Charpentier, P.6
- Crozon, M.7
- Delpierre, P.7
- Mas, J.7
- Tilquin, A.7
- NA3 Collaboration
- 1. Ecole Polytechnique, 91 - Palaiseau (France)
- 2. Paris-11 Univ., 91 - Orsay (France). Lab. de l'Accelerateur Lineaire
- 3. European Organization for Nuclear Research, Geneva (Switzerland)
- 4. Pisa Univ. (Italy)
- 5. Istituto Nazionale di Fisica Nucleare, Pisa (Italy)
- 6. CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France)
- 7. College de France, 75 - Paris
Description
We present results from a direct photon pair search performed with the NA3 spectrometer, using incident positive and negative beams at 200 GeV/c interacting with a carbon target. The experiment is sensitive to photons with psub(T)>1.8 GeV/c and -0.4<=ysup(*)<=1.0, one in each arm of the apparatus. A 3 standard deviation signal is seen in π- and p interactions. The cross section is higher than the second order QCD calculations, but systematic errors are large. (orig.)
Additional details
Publishing Information
- Journal Title
- Phys. Lett., B
- Journal Volume
- 164
- Journal Issue
- 1-3
- Series
- Phys. Lett., B.
- Journal Page Range
- 184-188
- ISSN
- 0370-2693
- CODEN
- PYLBA
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 17018526
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- CARBON 12 TARGET; DIFFERENTIAL CROSS SECTIONS; EXPERIMENTAL DATA; GEV RANGE 100-1000; INCLUSIVE INTERACTIONS; INTEGRAL CROSS SECTIONS; PAIR PRODUCTION; PHOTONS; PION MINUS REACTIONS; PION PLUS REACTIONS; PION REACTIONS; PROTON REACTIONS; RELATIVISTIC RANGE; TRANSVERSE MOMENTUM
- Descriptors DEC
- BARYON REACTIONS; BOSONS; CROSS SECTIONS; DATA; ELEMENTARY PARTICLES; ENERGY RANGE; GEV RANGE; HADRON REACTIONS; INFORMATION; INTERACTIONS; LINEAR MOMENTUM; MASSLESS PARTICLES; MESON REACTIONS; NUCLEAR REACTIONS; NUCLEON REACTIONS; NUMERICAL DATA; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; TARGETS
Optional Information
- Collaborations
- NA3 Collaboration.