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Search: WFRF:(De Leo V.)

  • Result 1-10 of 160
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  • Aaltonen, T., et al. (author)
  • Combination of CDF and D0 measurements of the W boson helicity in top quark decays
  • 2012
  • In: Physical Review D. - 1550-7998 .- 1550-2368. ; 85:7, s. 071106-
  • Journal article (peer-reviewed)abstract
    • We report the combination of recent measurements of the helicity of the W boson from top quark decay by the CDF and D0 collaborations, based on data samples corresponding to integrated luminosities of 2.7-5.4 fb(-1) of p (p) over bar collisions collected during Run II of the Fermilab Tevatron collider. Combining measurements that simultaneously determine the fractions of W bosons with longitudinal (f(0)) and right-handed (f(+)) helicities, we find f(0) = 0.722 +/- 0.081[+/- 0.062(stat) +/- 0.052(syst)] and f(+) = -0.033 +/- 0.046[+/- 0.034(stat) +/- 0.031(syst)]. Combining measurements where one of the helicity fractions is fixed to the value expected in the standard model, we find f(0) = 0.682 +/- 0.057[+/- 0.035(stat) +/- 0.046(syst)] for fixed f(+) and f(+) = -0.015 +/- 0.035[+/- 0.018(stat) +/- 0.030(syst)] for fixed f(0). The results are consistent with standard model expectations.
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  • Aaltonen, T., et al. (author)
  • Evidence for a Particle Produced in Association with Weak Bosons and Decaying to a Bottom-Antibottom Quark Pair in Higgs Boson Searches at the Tevatron
  • 2012
  • In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 109:7, s. 071804-
  • Journal article (peer-reviewed)abstract
    • We combine searches by the CDF and D0 Collaborations for the associated production of a Higgs boson with a W or Z boson and subsequent decay of the Higgs boson to a bottom-antibottom quark pair. The data, originating from Fermilab Tevatron p (p) over bar collisions at root s = 1.96 TeV, correspond to integrated luminosities of up to 9.7 fb(-1). The searches are conducted for a Higgs boson with mass in the range 100-150 GeV/c(2). We observe an excess of events in the data compared with the background predictions, which is most significant in the mass range between 120 and 135 GeV/c(2). The largest local significance is 3.3 standard deviations, corresponding to a global significance of 3.1 standard deviations. We interpret this as evidence for the presence of a new particle consistent with the standard model Higgs boson, which is produced in association with a weak vector boson and decays to a bottom-antibottom quark pair.
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10.
  • Aaltonen, T., et al. (author)
  • Tevatron Run II combination of the effective leptonic electroweak mixing angle
  • 2018
  • In: Physical Review D. - : AMER PHYSICAL SOC. - 2470-0010 .- 2470-0029. ; 97:11
  • Journal article (peer-reviewed)abstract
    • Drell-Yan lepton pairs produced in the process p (p) over bar -> l(+)l(-) + X through an intermediate gamma*/Z boson have an asymmetry in their angular distribution related to the spontaneous symmetry breaking of the electroweak force and the associated mixing of its neutral gauge bosons. The CDF and D0 experiments have measured the effective-leptonic electroweak mixing parameter sin(2) theta(lept)(eff) using electron and muon pairs selected from the full Tevatron proton-antiproton data sets collected in 2001-2011, corresponding to 9-10 fb(-1) of integrated luminosity. The combination of these measurements yields the most precise result from hadron colliders, sin(2)theta(lept)(eff) = 0.23148 +/- 0.00033. This result is consistent with, and approaches in precision, the best measurements from electron-positron colliders. The standard model inference of the on-shell electroweak mixing parameter sin(2) theta(W), or equivalently the W-boson mass M-W, using the ZFITTER software package yields sin(2) theta(W) = 0.22324 +/- 0.00033 or equivalently, M-W = 80.367 +/- 0.017 GeV/c(2).
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  • Result 1-10 of 160
Type of publication
journal article (156)
research review (2)
Type of content
peer-reviewed (158)
Author/Editor
De Leo, D (37)
Naghavi, M (32)
Moradi-Lakeh, M (30)
Farzadfar, F (29)
Monasta, L (29)
Dandona, R (28)
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Malekzadeh, R (28)
Gupta, R. (27)
Dandona, L (27)
Nangia, V (27)
Ronfani, L (27)
Fischer, F (26)
Hafezi-Nejad, N (26)
Koyanagi, A (26)
Liu, Y. (25)
Bedi, N (25)
Faro, A (25)
Mendoza, W (25)
Miller, TR (25)
Pourmalek, F (25)
Remuzzi, G (25)
Larsson, Anders (24)
Bikbov, B (24)
Lalloo, R (24)
Leigh, J (24)
Lozano, R (24)
Lunevicius, R (24)
Mohammed, S (24)
Radfar, A (24)
Sliwa, K. (23)
Abd-Allah, F (23)
Cardenas, R (23)
Deribe, K (23)
Jonas, JB (23)
Karch, A (23)
Majeed, A (23)
Perico, N (23)
Pesudovs, K (23)
Tonelli, M. (22)
Alvis-Guzman, N (22)
Antonio, CAT (22)
Catala-Lopez, F (22)
Dharmaratne, SD (22)
Esteghamati, A (22)
Hamidi, S (22)
Kabir, Z (22)
Kosen, S (22)
Meretoja, A (22)
Negoi, I (22)
Polinder, S (22)
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University
Karolinska Institutet (94)
Uppsala University (92)
Lund University (56)
Högskolan Dalarna (33)
University of Gothenburg (31)
Umeå University (20)
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Stockholm University (15)
Mid Sweden University (10)
Chalmers University of Technology (10)
Linköping University (8)
Örebro University (5)
Södertörn University (3)
Swedish University of Agricultural Sciences (3)
Royal Institute of Technology (1)
Halmstad University (1)
Jönköping University (1)
Stockholm School of Economics (1)
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Language
English (160)
Research subject (UKÄ/SCB)
Medical and Health Sciences (91)
Natural sciences (52)
Social Sciences (4)

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