${\mathit {\mathit t}}$-quark DECAY WIDTH

INSPIRE   PDGID:
Q007W
VALUE (GeV) CL% DOCUMENT ID TECN  COMMENT
$\bf{ 1.42 {}^{+0.19}_{-0.15}}$ OUR AVERAGE  Error includes scale factor of 1.4.
$1.76$ $\pm0.33$ ${}^{+0.79}_{-0.68}$ 1
AABOUD
2018AZ
 ATLS ${{\mathit \ell}}+\not E_T+{}\geq{}$4j (${}\geq{}$1 ${{\mathit b}}$)
$1.36$ $\pm0.02$ ${}^{+0.14}_{-0.11}$ 2
KHACHATRYAN
2014E
 CMS ${{\mathit \ell}}{{\mathit \ell}}+\not E_T$+2-4jets (0-2${{\mathit b}}$-tag)
$2.00$ ${}^{+0.47}_{-0.43}$ 3
ABAZOV
2012T
 D0 $\Gamma $( ${{\mathit t}}$ $\rightarrow$ ${{\mathit b}}{{\mathit W}}$)/B( ${{\mathit t}}$ $\rightarrow$ ${{\mathit b}}{{\mathit W}}$)
• • We do not use the following data for averages, fits, limits, etc. • •
$<6.38$ 95 4
AALTONEN
2013Z
 CDF ${{\mathit \ell}}+\not E_T+{}\geq{}$4j (${}\geq{}$0 ${{\mathit b}}$), direct
$1.99$ ${}^{+0.69}_{-0.55}$ 5
ABAZOV
2011B
 D0 Repl. by ABAZOV 2012T
$> 1.21$ 95 5
ABAZOV
2011B
 D0 ${{\mathit \Gamma}}$( ${{\mathit t}}$ $\rightarrow$ ${{\mathit W}}{{\mathit b}}$)
$<7.6$ 95 6
AALTONEN
2010AC
 CDF ${{\mathit \ell}}$ + jets, direct
$<13.1$ 95 7
AALTONEN
2009M
 CDF ${\mathit m}_{{{\mathit t}}}$(rec) distribution
1  Based on 20.2 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ data at $\sqrt {s }$ = 8 TeV. ${{\mathit \Gamma}_{{{t}}}}$ is measured using a template fit to the reconstructed invariant mass of the ${{\mathit b}}$-jet of the semileptonically decaying top quark and the corresponding lepton, and the angular distance between ${{\mathit j}_{{{b}}}}$ and ${{\mathit j}_{{{l}}}}$ in hadronic top decay. Signal templates are generated by reweighting events at parton-level to Breit-Wigner distribution with different ${{\mathit \Gamma}_{{{t}}}}$ hypotheses for ${\mathit m}_{{{\mathit t}}}$ = 172.5 GeV. The result is consistent with the NNLO SM prediction of 1.322 GeV.
2  Based on 19.7 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ data at $\sqrt {s }$ = 8 TeV. The result is obtained by combining the measurement of ${{\mathit R}}$ = ${{\mathit \Gamma}}$( ${{\mathit t}}$ $\rightarrow$ ${{\mathit W}}{{\mathit b}})/{{\mathit \Gamma}}$( ${{\mathit t}}$ $\rightarrow$ ${{\mathit W}}{{\mathit q}}$ (${{\mathit q}}={{\mathit b}},{{\mathit s}},{{\mathit d}}$)) and a previous CMS measurement of the ${{\mathit t}}$-channel single top production cross section of CHATRCHYAN 2012BQ, by using the theoretical calculation of ${{\mathit \Gamma}}$( ${{\mathit t}}$ $\rightarrow$ ${{\mathit W}}{{\mathit b}}$) for ${\mathit m}_{{{\mathit t}}}$ = 172.5 GeV.
3  Based on 5.4 fb${}^{-1}$ of data in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at 1.96 TeV. $\Gamma $( ${{\mathit t}}$ $\rightarrow$ ${{\mathit b}}{{\mathit W}}$) = $1.87$ ${}^{+0.44}_{-0.40}$ GeV is obtained from the observed ${{\mathit t}}$-channel single top quark production cross section, whereas B( ${{\mathit t}}$ $\rightarrow$ ${{\mathit b}}{{\mathit W}}$) = $0.90$ $\pm0.04$ is used assuming $\sum_{q}$B( ${{\mathit t}}$ $\rightarrow$ ${{\mathit q}}{{\mathit W}}$) = 1. The result is valid for ${\mathit m}_{{{\mathit t}}}$ = 172.5 GeV. See the paper for the values for ${\mathit m}_{{{\mathit t}}}$ = 170 or 175 GeV.
4  Based on 8.7 fb${}^{-1}$ of data. The two sided 68$\%$ CL interval is 1.10 GeV $<$ ${{\mathit \Gamma}_{{{t}}}}$ $<$ 4.05 GeV for ${\mathit m}_{{{\mathit t}}}$ = 172.5 GeV.
5  Based on 2.3 fb${}^{-1}$ in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\sqrt {s }$ = 1.96 TeV. ABAZOV 2011B extracted ${{\mathit \Gamma}_{{{t}}}}$ from the partial width ${{\mathit \Gamma}}$( ${{\mathit t}}$ $\rightarrow$ ${{\mathit W}}{{\mathit b}}$) = $1.92$ ${}^{+0.58}_{-0.51}$ GeV measured using the ${{\mathit t}}$-channel single top production cross section, and the branching fraction br{ {{\mathit t}} \rightarrow {{\mathit W}} {{\mathit b}}} = $0.962$ ${}^{+0.068}_{-0.066}$(stat)${}^{+0.064}_{-0.052}$(syst). The ${{\mathit \Gamma}}$( ${{\mathit t}}$ $\rightarrow$ ${{\mathit W}}{{\mathit b}}$) measurement gives the 95$\%$ CL lowerbound of ${{\mathit \Gamma}}$( ${{\mathit t}}$ $\rightarrow$ ${{\mathit W}}{{\mathit b}}$) and hence that of ${{\mathit \Gamma}_{{{t}}}}$.
6  Results are based on 4.3 fb${}^{-1}$ of data in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\sqrt {s }$ = 1.96 TeV. The top quark mass and the hadronically decaying ${{\mathit W}}$ boson mass are reconstructed for each candidate events and compared with templates of different top quark width. The two sided 68$\%$ CL interval is 0.3 GeV$<$ ${{\mathit \Gamma}_{{{t}}}}<$ 4.4 GeV for ${\mathit m}_{{{\mathit t}}}$ = 172.5 GeV.
7  Based on 955 pb${}^{-1}$ of ${{\mathit p}}{{\overline{\mathit p}}}$ collision data at $\sqrt {s }$ = 1.96 TeV. AALTONEN 2009M selected ${{\mathit t}}{{\overline{\mathit t}}}$ candidate events for the ${{\mathit \ell}}$ + $\not E_T$ + jets channel with one or two ${{\mathit b}}$-tags, and examine the decay width dependence of the reconstructed ${\mathit m}_{{{\mathit t}}}$ distribution. The result is for ${\mathit m}_{{{\mathit t}}}$ =175 GeV, whereas the upper limit is lower for smaller ${\mathit m}_{{{\mathit t}}}$.
References