Z + {gamma} cross-section measurement, {sigma}*BR(Z + {gamma}), in the electron channel for p{bar p} collisions at {radical}s = 1.8 TeV, and limits for the ZZ{gamma} and Z{gamma}{gamma} anomalous couplings

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The Z + {gamma} cross-section x branching ratio in the electron channel has been measured using the inclusive Z data sample from the CDF 1988--1989 collider run, for which the total integrated luminosity was 4.05 {plus_minus} 0.28 pb{sup {minus}1}. Two Z{gamma} candidates are observed from central photon events with {Delta}R/{sub {gamma}} > 0.7 and E{sub t}{sup {gamma}} > 5.0 GeV. From these events the {sigma} * BR(Z + {gamma}) is measured and compared with SM predictions: {sigma} * BR(Z + {gamma}){sub e} = 6.8{sub {minus}5.7}{sup +5.7}(stat + syst)pb {sigma} * BR(Z + {gamma})SM = 4.7{sub {minus}4.7}{sup +0.7}(stat + syst)pb. From … continued below

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Roach-Bellino, M. February 1, 1994.

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The Z + {gamma} cross-section x branching ratio in the electron channel has been measured using the inclusive Z data sample from the CDF 1988--1989 collider run, for which the total integrated luminosity was 4.05 {plus_minus} 0.28 pb{sup {minus}1}. Two Z{gamma} candidates are observed from central photon events with {Delta}R/{sub {gamma}} > 0.7 and E{sub t}{sup {gamma}} > 5.0 GeV. From these events the {sigma} * BR(Z + {gamma}) is measured and compared with SM predictions: {sigma} * BR(Z + {gamma}){sub e} = 6.8{sub {minus}5.7}{sup +5.7}(stat + syst)pb {sigma} * BR(Z + {gamma})SM = 4.7{sub {minus}4.7}{sup +0.7}(stat + syst)pb. From this ZZ{sub {gamma}} cross section measurement limits on the Z{sub {gamma}{gamma}} and couplings for three different choices of compositeness scale {Lambda}{sub Z} are obtained. The experimental sensitivity to the h{sub 30}{sup Z,{gamma}}/h{sub 10}{sup Z,{gamma}} couplings is in the range of {Lambda}{sub Z} {approximately} 450--500 GeV and for the h{sub 40}{sup Z{gamma}}/h{sub 20}{sup Z,{gamma}} couplings {Lambda}{sub Z} {approximately} 300 GeV.

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109 p.

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INIS; OSTI as DE94008185; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov

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  • Other Information: TH: Thesis (Ph.D.)

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  • Other: DE94008185
  • Report No.: DOE/ER/40702--5
  • Grant Number: FG02-92ER40702
  • Office of Scientific & Technical Information Report Number: 10133105
  • Archival Resource Key: ark:/67531/metadc1310641

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  • February 1, 1994

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Thumbnail image of item number 1 in: 'Z + {gamma} cross-section measurement, {sigma}*BR(Z + {gamma}), in the electron channel for p{bar p} collisions at {radical}s = 1.8 TeV, and limits for the ZZ{gamma} and Z{gamma}{gamma} anomalous couplings'.
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Thumbnail image of item number 3 in: 'Z + {gamma} cross-section measurement, {sigma}*BR(Z + {gamma}), in the electron channel for p{bar p} collisions at {radical}s = 1.8 TeV, and limits for the ZZ{gamma} and Z{gamma}{gamma} anomalous couplings'.
Thumbnail image of item number 4 in: 'Z + {gamma} cross-section measurement, {sigma}*BR(Z + {gamma}), in the electron channel for p{bar p} collisions at {radical}s = 1.8 TeV, and limits for the ZZ{gamma} and Z{gamma}{gamma} anomalous couplings'.

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Roach-Bellino, M. Z + {gamma} cross-section measurement, {sigma}*BR(Z + {gamma}), in the electron channel for p{bar p} collisions at {radical}s = 1.8 TeV, and limits for the ZZ{gamma} and Z{gamma}{gamma} anomalous couplings, thesis or dissertation, February 1, 1994; United States. (https://digital.library.unt.edu/ark:/67531/metadc1310641/: accessed May 1, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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