TY - JOUR
T1 - Search for standard-model Z and Higgs bosons decaying into a bottom-antibottom quark pair in proton-antiproton collisions at 1.96 TeV SEARCH for STANDARD-MODEL Z and HIGGS ... T. AALTONEN et al.
AU - CDF Collaboration
AU - Aaltonen, T.
AU - Amerio, S.
AU - Amidei, D.
AU - Anastassov, A.
AU - Annovi, A.
AU - Antos, J.
AU - Apollinari, G.
AU - Appel, J. A.
AU - Arisawa, T.
AU - Artikov, A.
AU - Asaadi, J.
AU - Ashmanskas, W.
AU - Auerbach, B.
AU - Aurisano, A.
AU - Azfar, F.
AU - Badgett, W.
AU - Bae, T.
AU - Barbaro-Galtieri, A.
AU - Barnes, V. E.
AU - Barnett, B. A.
AU - Barria, P.
AU - Bartos, P.
AU - Bauce, M.
AU - Bedeschi, F.
AU - Behari, S.
AU - Bellettini, G.
AU - Bellinger, J.
AU - Benjamin, D.
AU - Beretvas, A.
AU - Bhatti, A.
AU - Bland, K. R.
AU - Blumenfeld, B.
AU - Bocci, A.
AU - Bodek, A.
AU - Bortoletto, D.
AU - Boudreau, J.
AU - Boveia, A.
AU - Brigliadori, L.
AU - Bromberg, C.
AU - Brucken, E.
AU - Budagov, J.
AU - Budd, H. S.
AU - Burkett, K.
AU - Busetto, G.
AU - Bussey, P.
AU - Butti, P.
AU - Buzatu, A.
AU - Calamba, A.
AU - Camarda, S.
AU - Yorita, K.
N1 - Publisher Copyright:
© 2018 authors. Published by the American Physical Society.
PY - 2018/10/1
Y1 - 2018/10/1
N2 - 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.
AB - 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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U2 - 10.1103/PhysRevD.98.072002
DO - 10.1103/PhysRevD.98.072002
M3 - Article
AN - SCOPUS:85056190367
SN - 2470-0010
VL - 98
JO - Physical Review D
JF - Physical Review D
IS - 7
M1 - 072002
ER -