Search for standard-model Z and Higgs bosons decaying into a bottom-antibottom quark pair in proton-antiproton collisions at 1.96 TeV
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Search for standard-model Z and Higgs bosons decaying into a bottom-antibottom quark pair in proton-antiproton collisions at 1.96 TeV

  • Author(s): Aaltonen, T
  • Amerio, S
  • Amidei, D
  • Anastassov, A
  • Annovi, A
  • Antos, J
  • Apollinari, G
  • Appel, JA
  • Arisawa, T
  • Artikov, A
  • Asaadi, J
  • Ashmanskas, W
  • Auerbach, B
  • Aurisano, A
  • Azfar, F
  • Badgett, W
  • Bae, T
  • Barbaro-Galtieri, A
  • Barnes, VE
  • Barnett, BA
  • Barria, P
  • Bartos, P
  • Bauce, M
  • Bedeschi, F
  • Behari, S
  • Bellettini, G
  • Bellinger, J
  • Benjamin, D
  • Beretvas, A
  • Bhatti, A
  • Bland, KR
  • Blumenfeld, B
  • Bocci, A
  • Bodek, A
  • Bortoletto, D
  • Boudreau, J
  • Boveia, A
  • Brigliadori, L
  • Bromberg, C
  • Brucken, E
  • Budagov, J
  • Budd, HS
  • Burkett, K
  • Busetto, G
  • Bussey, P
  • Butti, P
  • Buzatu, A
  • Calamba, A
  • Camarda, S
  • Campanelli, M
  • Canelli, F
  • Carls, B
  • Carlsmith, D
  • Carosi, R
  • Carrillo, S
  • Casal, B
  • Casarsa, M
  • Castro, A
  • Catastini, P
  • Cauz, D
  • Cavaliere, V
  • Cerri, A
  • Cerrito, L
  • Chen, YC
  • Chertok, M
  • Chiarelli, G
  • Chlachidze, G
  • Cho, K
  • Chokheli, D
  • Clark, A
  • Clarke, C
  • Convery, ME
  • Conway, J
  • Corbo, M
  • Cordelli, M
  • Cox, CA
  • Cox, DJ
  • Cremonesi, M
  • Cruz, D
  • Cuevas, J
  • Culbertson, R
  • d’Ascenzo, N
  • Datta, M
  • de Barbaro, P
  • Demortier, L
  • Deninno, M
  • D’Errico, M
  • Devoto, F
  • Di Canto, A
  • Di Ruzza, B
  • Dittmann, JR
  • Donati, S
  • D’Onofrio, M
  • Dorigo, M
  • Driutti, A
  • Ebina, K
  • Edgar, R
  • Elagin, A
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  • Esham, B
  • Farrington, S
  • Fernández Ramos, JP
  • Field, R
  • Flanagan, G
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  • Margaroli, F
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  • Mattson, ME
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  • Ronzani, M
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  • Rosner, JL
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  • Rusu, V
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  • Schmidt, EE
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  • Semenov, A
  • Sforza, F
  • Shalhout, SZ
  • Shears, T
  • Shepard, PF
  • Shimojima, M
  • Shochet, M
  • Shreyber-Tecker, I
  • Simonenko, A
  • Sliwa, K
  • Smith, JR
  • Snider, FD
  • Song, H
  • Sorin, V
  • Denis, R St
  • Stancari, M
  • Stentz, D
  • Strologas, J
  • Sudo, Y
  • Sukhanov, A
  • Suslov, I
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  • Takeuchi, Y
  • Tang, J
  • Tecchio, M
  • Teng, PK
  • Thom, J
  • Thomson, E
  • Thukral, V
  • Toback, D
  • Tokar, S
  • Tollefson, K
  • Tomura, T
  • Tonelli, D
  • Torre, S
  • Torretta, D
  • Totaro, P
  • Trovato, M
  • Ukegawa, F
  • Uozumi, S
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  • Velev, G
  • Vellidis, C
  • Vernieri, C
  • Vidal, M
  • Vilar, R
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  • Vogel, M
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  • Wallny, R
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  • et al.

Published Web Location

http://10.0.4.79/physrevd.98.072002
No data is associated with this publication.
Abstract

© 2018 authors. Published by the American Physical Society. The Collider Detector at Fermilab collected a unique sample of jets originating from bottom-quark fragmentation (b-jets) by selecting online proton-antiproton (pp̄) collisions with a vertex displaced from the pp̄ interaction point, consistent with the decay of a bottom-quark hadron. This data set, collected at a center-of-mass energy of 1.96 TeV, and corresponding to an integrated luminosity of 5.4 fb-1, is used to measure the Z-boson production cross section times branching ratio into bb̄. The number of Z→bb̄ events is determined by fitting the dijet-mass distribution, while constraining the dominant b-jet background, originating from QCD multijet events, with data. The result, σ(pp̄→Z)×B(Z→bb̄)=1.11±0.08(stat)±0.14(syst) nb, is the most precise measurement of this process, and is consistent with the standard-model prediction. The data set is also used to search for Higgs-boson production. No significant signal is expected in our data and the first upper limit on the cross section for the inclusive pp̄→H→bb̄ process at s=1.96 TeV is set, corresponding to 33 times the expected standard-model cross section, or σ=40.6 pb, at the 95% confidence level.

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