Published December 1988
| Version v1
Journal article
Evidence for direct photons from quarks in electron-positron annihilation
Creators
- Braunschweig, W.1
- Gerhards, R.1
- Kirschfink, F.J.1
- Martyn, H.U.1
- Bock, B.2
- Fischer, H.M.2
- Hartmann, H.2
- Hartmann, J.2
- Hilger, E.2
- Jocksch, A.2
- Wedemeyer, R.2
- Foster, B.3
- Martin, A.J.3
- Sephton, A.J.3
- Barreiro, F.4
- Bernardi, E.4
- Chwastowski, J.4
- Eskreys, A.4
- Gather, K.4
- Genser, K.4
- Hultschig, H.4
- Joos, P.4
- Kowalski, H.4
- Ladage, A.4
- Loehr, B.4
- Lueke, D.4
- Maettig, P.4
- Notz, D.4
- Pawlak, J.M.4
- Poesnecker, K.U.4
- Ros, E.4
- Tymieniecka, T.4
- Trines, D.4
- Walczak, R.4
- Wolf, G.4
- Kolanoski, H.5
- Gerhardt, W.6
- Kracht, T.6
- Krueger, J.6
- Lohrmann, E.6
- Poelz, G.6
- Rehders, P.6
- Tysarczyk, G.6
- Zeuner, W.6
- Hassard, J.7
- Shulman, J.7
- Su, D.7
- Leites, A.8
- Peso, J. del8
- Balkwill, C.9
- Bowler, M.G.9
- Burrows, P.N.9
- Heath, G.P.9
- Ratoff, P.9
- Silvester, I.9
- Tomalin, I.R.9
- Veitch, M.E.9
- Forden, G.E.10
- Hart, J.C.10
- Saxon, D.H.10
- Brandt, S.11
- Holder, M.11
- Labarga, L.11
- Eisenberg, Y.12
- Karshon, U.12
- Mikenberg, G.12
- Montag, A.12
- Revel, D.12
- Ronat, E.12
- Shapira, A.12
- Wainer, N.12
- Yekutieli, G.12
- Muller, D.13
- Ritz, S.13
- Strom, D.13
- Takashima, M.13
- Wu Saulan13
- Zobernig, G.13
- TASSO Collaboration
- 1. Technische Hochschule Aachen (Germany, F.R.). Lehrstuhl fuer Experimentalphysik 1A und 1. Physikalisches Inst.
- 2. Bonn Univ. (Germany, F.R.). Physikalisches Inst.
- 3. Bristol Univ. (UK). H.H. Wills Physics Lab.
- 4. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)
- 5. Dortmund Univ. (Germany, F.R.). Inst. fuer Physik
- 6. Hamburg Univ. (Germany, F.R.). 2. Inst. fuer Experimentalphysik
- 7. Imperial Coll. of Science and Technology, London (UK). Dept. of Physics
- 8. Universidad Autonoma de Madrid (Spain)
- 9. Oxford Univ. (UK). Dept. of Nuclear Physics
- 10. Rutherford Appleton Lab., Chilton (UK)
- 11. Siegen Univ. (Gesamthochschule) (Germany, F.R.). Fachbereich 7 - Physik
- 12. Weizmann Inst. of Science, Rehovoth (Israel)
- 13. Wisconsin Univ., Madison (USA). Dept. of Physics
Description
Hadronic events from e+e--annihilations with a high energy isolated photon have been investigated at C.M. energies between 14 GeV and 44 GeV. A forward-backward asymmetry Aγ of the positively charged jet with respect to the incident positron direction has been found: Aγω 0.32±0.07, providing evidence for photon bremsstrahlung from quarks. The forward-backward asymmetry of all hadronic events at C.M. energies between 30 GeV and 36 GeV has been measured. The value, corrected for the limited polar angle acceptance of the detector, is: A=+0.021±0.005. (orig.)
Additional details
Publishing Information
- Journal Title
- Zeitschrift fuer Physik, C
- Journal Volume
- 41
- Journal Issue
- 3
- Series
- Z. Phys., C.
- Journal Page Range
- 385-393
- ISSN
- 0170-9739
- CODEN
- ZPCFD
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 20007233
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ANGULAR DISTRIBUTION; ANNIHILATION; ASYMMETRY; BREMSSTRAHLUNG; CHARGE DISTRIBUTION; DIFFERENTIAL CROSS SECTIONS; ELECTRON-POSITRON INTERACTIONS; EXPERIMENTAL DATA; GAMMA SPECTRA; GEV RANGE 10-100; HADRONS; INCLUSIVE INTERACTIONS; JET MODEL; MULTIPLE PRODUCTION; PAIR PRODUCTION; PHOTONS; QUARKS
- Descriptors DEC
- BOSONS; CROSS SECTIONS; DATA; DISTRIBUTION; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; INFORMATION; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; MASSLESS PARTICLES; MATHEMATICAL MODELS; NUMERICAL DATA; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PRODUCTION; POSTULATED PARTICLES; RADIATIONS; SPECTRA
Optional Information
- Contract/Grant/Project number
- Contract DE-AC02-76ER000881; Grant INT-83-13994; CPBP 01.06
- Collaborations
- TASSO Collaboration.