# ${{\boldsymbol b}^{\,'}}(-1$/3) mass limits from single production in ${{\boldsymbol p}}{{\overline{\boldsymbol p}}}$ and ${{\boldsymbol p}}{{\boldsymbol p}}$ collisions INSPIRE search

VALUE (GeV) CL% DOCUMENT ID TECN  COMMENT
$>1500$ 95 1
 2016 AH
ATLS ${{\mathit g}}$ ${{\mathit b}}$ $\rightarrow$ ${{\mathit b}^{\,'}}$ $\rightarrow$ ${{\mathit t}}{{\mathit W}}$ , B( ${{\mathit b}^{\,'}}$ $\rightarrow$ ${{\mathit t}}{{\mathit W}}$ )=1
$> 1390$ 95 2
 2016 I
CMS ${{\mathit g}}$ ${{\mathit b}}$ $\rightarrow$ ${{\mathit b}^{\,'}}$ $_{ {{\mathit L}} }$ $\rightarrow$ ${{\mathit t}}{{\mathit W}}$ , B( ${{\mathit b}^{\,'}}$ $_{ {{\mathit L}} }$ $\rightarrow$ ${{\mathit t}}{{\mathit W}}$ )=1
$> 1430$ 95 3
 2016 I
CMS ${{\mathit g}}$ ${{\mathit b}}$ $\rightarrow$ ${{\mathit b}^{\,'}}$ $_{R}$ $\rightarrow$ ${{\mathit t}}{{\mathit W}}$ , B( ${{\mathit b}^{\,'}}$ $_{R}$ $\rightarrow$ ${{\mathit t}}{{\mathit W}}$ )=1
$\bf{> 1530}$ 95 4
 2016 I
CMS ${{\mathit g}}$ ${{\mathit b}}$ $\rightarrow$ ${{\mathit b}^{\,'}}$ $\rightarrow$ ${{\mathit t}}{{\mathit W}}$ , B( ${{\mathit b}^{\,'}}$ $\rightarrow$ ${{\mathit t}}{{\mathit W}}$ )=1
$\bf{> 693}$ 95 5
 2011 F
D0 ${{\mathit q}}$ ${{\mathit u}}$ $\rightarrow$ ${{\mathit q}^{\,'}}{{\mathit b}^{\,'}}$ $\rightarrow$ ${{\mathit q}^{\,'}}$ ( ${{\mathit W}}{{\mathit u}}$ ) ${{\widetilde{\mathit \kappa}}}_{ {{\mathit u}} {{\mathit b}^{\,'}} }$=1, B( ${{\mathit b}^{\,'}}$ $\rightarrow$ ${{\mathit W}}{{\mathit u}}$ )=1
$\bf{> 430}$ 95 5
 2011 F
D0 ${{\mathit q}}$ ${{\mathit d}}$ $\rightarrow$ ${{\mathit q}}{{\mathit b}^{\,'}}$ $\rightarrow$ ${{\mathit q}}$ ( ${{\mathit Z}}{{\mathit d}}$ ) ${{\widetilde{\mathit \kappa}}}_{ {{\mathit d}} {{\mathit b}^{\,'}} }=\sqrt {2 }$, B( ${{\mathit b}^{\,'}}$ $\rightarrow$ ${{\mathit Z}}{{\mathit d}}$ )=1
1  AAD 2016AH based on 20.3 fb${}^{-1}$ of data in ${{\mathit p}}{{\mathit p}}$ collisions at 8 TeV. No significant excess over SM expectation is found in the search for a vector-like ${{\mathit b}^{\,'}}$ in the single-lepton and dilepton channels (${{\mathit \ell}}$ or ${{\mathit \ell}}{{\mathit \ell}}$ ) + 1,2,3 ${{\mathit j}}$ (${}\geq{}1{{\mathit b}}$). The model assumes that the ${{\mathit b}^{\,'}}$ has the excited quark couplings.
2  Based on 19.7 fb${}^{-1}$ of data in ${{\mathit p}}{{\mathit p}}$ collisions at 8 TeV. Limit on left-handed ${{\mathit b}^{\,'}}$ assuming 100$\%$ decay to ${{\mathit t}}{{\mathit W}}$ and using all-hadronic, lepton + jets, and dilepton final states.
3  Based on 19.7 fb${}^{-1}$ of data in ${{\mathit p}}{{\mathit p}}$ collisions at 8 TeV. Limit on right-handed ${{\mathit b}^{\,'}}$ assuming 100$\%$ decay to ${{\mathit t}}{{\mathit W}}$ and using all-hadronic, lepton + jets, and dilepton final states.
4  Based on 19.7 fb${}^{-1}$ of data in ${{\mathit p}}{{\mathit p}}$ collisions at 8 TeV. Limit on vector-like ${{\mathit b}^{\,'}}$ assuming 100$\%$ decay to ${{\mathit t}}{{\mathit W}}$ and using all-hadronic, lepton+jets, and dilepton final states.
5  Based on 5.4 fb${}^{-1}$ of data in ppbar collisions at 1.96 TeV. ABAZOV 2011F looked for single production of ${{\mathit b}^{\,'}}$ via the ${{\mathit W}}$ or ${{\mathit Z}}$ coupling to the first generation up or down quarks, respectively. Model independent cross section limits for the single production processes ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit b}^{\,'}}{{\mathit q}}$ $\rightarrow$ ${{\mathit W}}{{\mathit u}}{{\mathit q}}$ , and ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit b}^{\,'}}{{\mathit q}}$ $\rightarrow$ ${{\mathit Z}}{{\mathit d}}{{\mathit q}}$ are given in Figs. 3 and 4, respectively, and the mass limits are obtained for the model of ATRE 2009 with degenerate bi-doublets of vector-like quarks.
References:
JHEP 1602 110 Search for the Production of Single Vector-Like and Excited Quarks in the ${{\mathit W}}{\mathit {\mathit t}}$ Final State in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 8 TeV with the ATLAS Detector
JHEP 1601 166 Search for the Production of an Excited Bottom Quark Decaying to ${{\mathit t}}{{\mathit W}}$ in Proton-Proton Collisions at $\sqrt {s }$ = 8 TeV
PRL 106 081801 Search for Single Vectorlike Quarks in ${{\mathit p}}{{\overline{\mathit p}}}$ Collisions at $\sqrt {s }$ = 1.96 TeV