Isolated prompt singlephoton and diphoton production in {ovr p}p collisions

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Description

A measurement of the differential cross section d{sup 2}{sigma}/dE{sub T}d{eta} of isolated prompt photons, {ovr p}p {r_arrow} {gamma} + X is presented for two pseudorapidity ranges, |{eta}| < 0.9 and 1.6 < |{eta}| < 2.5, at {radical}s = 1.8 TeV. The data were accumulated during the 1992-1993 tevatron collider run (1A), consisting of 13 pb{sup -1} of integrated luminosity. The background is estimated by measuring the longitudinal shower profile in the four layers of the electromagnetic (EM) calorimeter. The results show good agreement with the next-to-leading-order QCD (NLO) calculations in the range 30 {approx_lt} E{sub T} {approx_lt} 80 GeV. A ... continued below

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7 p.

Creation Information

Chen, Wei September 1, 1996.

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  • Chen, Wei State University of New York, Stony Brook, NY (United States)

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Description

A measurement of the differential cross section d{sup 2}{sigma}/dE{sub T}d{eta} of isolated prompt photons, {ovr p}p {r_arrow} {gamma} + X is presented for two pseudorapidity ranges, |{eta}| < 0.9 and 1.6 < |{eta}| < 2.5, at {radical}s = 1.8 TeV. The data were accumulated during the 1992-1993 tevatron collider run (1A), consisting of 13 pb{sup -1} of integrated luminosity. The background is estimated by measuring the longitudinal shower profile in the four layers of the electromagnetic (EM) calorimeter. The results show good agreement with the next-to-leading-order QCD (NLO) calculations in the range 30 {approx_lt} E{sub T} {approx_lt} 80 GeV. A preliminary measurement of isolated prompt diphoton production, {ovr p}p {r_arrow} {gamma}{gamma} + X is also presented for the pseudorapidity range |{eta}| < 1.0. The data sample corresponds to an integrated luminosity of 80.0 pb{sup -1} from the 1994-1995 run (1B). Preliminary cross section measurements of d{sigma}/dE{sub T}, d{sigma}/dM and (1/{sigma})d{sigma}/dK{sub T} are reported and compared to the Pythia Monte Carlo. The K{sub T} (defined as K{sub T} = |{rvec P}{sup 1}{sub T} + {rvec P}{sup 2}{sub T}|) of the two photon system is measured in the range 0 < K{sub T} < 22 GeV. The shape at low K{sub T} data favors NLO QCD with an intrinsic <K{sub T}> = 2 GeV rather than the Pythia Monte Carlo or the NLO QCD calculation without an intrinsic <K{sub T}>. 9 refs., 6 figs., 1 tab.

Physical Description

7 p.

Notes

INIS; OSTI as DE98002950

Source

  • DPF `96: meeting of the Division of Particles and Fields of the American Physical Society (APS), Minneapolis, MN (United States), 10-15 Aug 1996

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  • Other: DE98002950
  • Report No.: FNAL/C--96/272-E(1)
  • Report No.: CONF-960812--
  • Grant Number: AC02-76CH03000
  • DOI: 10.2172/618795 | External Link
  • Office of Scientific & Technical Information Report Number: 618795
  • Archival Resource Key: ark:/67531/metadc694521

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  • September 1, 1996

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 1, 2016, 4:12 p.m.

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Chen, Wei. Isolated prompt singlephoton and diphoton production in {ovr p}p collisions, report, September 1, 1996; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc694521/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.