Measurement of the helicity of W bosons in top quark decays

CDF Collaboration

doi:10.1103/PhysRevLett.84.216

Measurement of the helicity of W bosons in top quark decays

CDF Collaboration

Physics

Research output: Contribution to journal › Article

54 Scopus citations

Abstract

We use the transverse momentum spectrum of leptons in the decay chain t→bW with W→lv to measure the helicity of the W bosons in the top quark rest frame. Our measurement uses a tt̄ sample isolated in 106±4pb^-1 of data collected in pp̄ collisions at √s=1.8TeV with the CDF detector at the Fermilab Tevatron. Assuming a standard V-A weak decay, we find that the fraction of W's with zero helicity in the top rest frame is F₀=0.91±0.37(stat)±0.13(syst), consistent with the standard model prediction of F₀=0.70 for a top mass of 175GeV/c².

Original language	English (US)
Pages (from-to)	216-221
Number of pages	6
Journal	Physical review letters
Volume	84
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.84.216
State	Published - 2000

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.84.216

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CDF Collaboration (2000). Measurement of the helicity of W bosons in top quark decays. Physical review letters, 84(2), 216-221. https://doi.org/10.1103/PhysRevLett.84.216

@article{d8d7096571fc4e219614215c4a0249f7,

title = "Measurement of the helicity of W bosons in top quark decays",

abstract = "We use the transverse momentum spectrum of leptons in the decay chain t→bW with W→lv to measure the helicity of the W bosons in the top quark rest frame. Our measurement uses a t{\=t} sample isolated in 106±4pb-1 of data collected in p{\=p} collisions at √s=1.8TeV with the CDF detector at the Fermilab Tevatron. Assuming a standard V-A weak decay, we find that the fraction of W's with zero helicity in the top rest frame is F0=0.91±0.37(stat)±0.13(syst), consistent with the standard model prediction of F0=0.70 for a top mass of 175GeV/c2.",

author = "{CDF Collaboration} and T. Affolder and H. Akimoto and A. Akopian and Albrow, {M. G.} and P. Amaral and Amendolia, {S. R.} and D. Amidei and J. Antos and G. Apollinari and T. Arisawa and T. Asakawa and W. Ashmanskas and M. Atac and P. Azzi-Bacchetta and N. Bacchetta and Bailey, {M. W.} and S. Bailey and {de Barbaro}, P. and A. Barbaro-Galtieri and Barnes, {V. E.} and Barnett, {B. A.} and M. Barone and G. Bauer and F. Bedeschi and S. Belforte and G. Bellettini and J. Bellinger and D. Benjamin and J. Bensinger and A. Beretvas and Berge, {J. P.} and J. Berryhill and S. Bertolucci and B. Bevensee and A. Bhatti and C. Bigongiari and M. Binkley and D. Bisello and Blair, {R. E.} and C. Blocker and K. Bloom and B. Blumenfeld and Blusk, {B. S.} and A. Bocci and A. Bodek and W. Bokhari and Y. Bonushkin and D. Bortoletto and J. Boudreau and Olsen, {James D.}",

year = "2000",

doi = "10.1103/PhysRevLett.84.216",

language = "English (US)",

volume = "84",

pages = "216--221",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "2",

}

TY - JOUR

T1 - Measurement of the helicity of W bosons in top quark decays

AU - CDF Collaboration

AU - Affolder, T.

AU - Akimoto, H.

AU - Akopian, A.

AU - Albrow, M. G.

AU - Amaral, P.

AU - Amendolia, S. R.

AU - Amidei, D.

AU - Antos, J.

AU - Apollinari, G.

AU - Arisawa, T.

AU - Asakawa, T.

AU - Ashmanskas, W.

AU - Atac, M.

AU - Azzi-Bacchetta, P.

AU - Bacchetta, N.

AU - Bailey, M. W.

AU - Bailey, S.

AU - de Barbaro, P.

AU - Barbaro-Galtieri, A.

AU - Barnes, V. E.

AU - Barnett, B. A.

AU - Barone, M.

AU - Bauer, G.

AU - Bedeschi, F.

AU - Belforte, S.

AU - Bellettini, G.

AU - Bellinger, J.

AU - Benjamin, D.

AU - Bensinger, J.

AU - Beretvas, A.

AU - Berge, J. P.

AU - Berryhill, J.

AU - Bertolucci, S.

AU - Bevensee, B.

AU - Bhatti, A.

AU - Bigongiari, C.

AU - Binkley, M.

AU - Bisello, D.

AU - Blair, R. E.

AU - Blocker, C.

AU - Bloom, K.

AU - Blumenfeld, B.

AU - Blusk, B. S.

AU - Bocci, A.

AU - Bodek, A.

AU - Bokhari, W.

AU - Bonushkin, Y.

AU - Bortoletto, D.

AU - Boudreau, J.

AU - Olsen, James D.

PY - 2000

Y1 - 2000

N2 - We use the transverse momentum spectrum of leptons in the decay chain t→bW with W→lv to measure the helicity of the W bosons in the top quark rest frame. Our measurement uses a tt̄ sample isolated in 106±4pb-1 of data collected in pp̄ collisions at √s=1.8TeV with the CDF detector at the Fermilab Tevatron. Assuming a standard V-A weak decay, we find that the fraction of W's with zero helicity in the top rest frame is F0=0.91±0.37(stat)±0.13(syst), consistent with the standard model prediction of F0=0.70 for a top mass of 175GeV/c2.

AB - We use the transverse momentum spectrum of leptons in the decay chain t→bW with W→lv to measure the helicity of the W bosons in the top quark rest frame. Our measurement uses a tt̄ sample isolated in 106±4pb-1 of data collected in pp̄ collisions at √s=1.8TeV with the CDF detector at the Fermilab Tevatron. Assuming a standard V-A weak decay, we find that the fraction of W's with zero helicity in the top rest frame is F0=0.91±0.37(stat)±0.13(syst), consistent with the standard model prediction of F0=0.70 for a top mass of 175GeV/c2.

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UR - http://www.scopus.com/inward/citedby.url?scp=85028209195&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.84.216

DO - 10.1103/PhysRevLett.84.216

M3 - Article

C2 - 11015876

AN - SCOPUS:85028209195

VL - 84

SP - 216

EP - 221

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 2

ER -