Erratum to: Hunting for vectorlike quarks
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Received: September 8, 2020 Accepted: September 12, 2020 Published: October 9, 2020
Radovan Derm´ıˇsek,a Enrico Lunghia and Seodong Shinb,c a
Physics Department, Indiana University, 727 E. Third St., Bloomington, IN 47405, U.S.A. b Enrico Fermi Institute, University of Chicago, 933 East 56th Street, Chicago, IL 60637, U.S.A. c Department of Physics and IPAP, Yonsei University, 50 Yonsei-ro, Seoul 03722, Korea
E-mail: [email protected], [email protected], [email protected] Erratum to: JHEP04(2019)019 ArXiv ePrint: 1901.03709
c The Authors. Open Access, Article funded by SCOAP3 .
https://doi.org/10.1007/JHEP10(2020)058
JHEP10(2020)058
Erratum: Hunting for vectorlike quarks
√ We found a mistake (involving a sign and factor of 2) which propagates through tables 2–5 and several equations presented in the appendix. The two lower panels of figure 1 are mildly modified while all other numerical results are unaffected. In tables 3–5 we adopt a more useful parameterization for the branching ratios in the case of a vectorlike quark doublet with couplings to Hu and Hd . Corrected versions of tables 2–5. Γ
doublet
singlet
t4 → W + b
2λ2Q c2β
2κ2T s2β
t4 → Zt
κ2Q s2β
t4 → ht
64π m b4
Γ
doublet
singlet
b4 → W + t
2κ2Q s2β
2λ2B c2β
κ2T s2β
b4 → Zb
λ2Q c2β
λ2B c2β
κ2Q s2β
κ2T s2β
b4 → hb
λ2Q c2β
λ2B c2β
t4 → Ht
κ2Q c2β
κ2T c2β
b4 → Hb
λ2Q s2β
λ2B s2β
t4 → H + b
2λ2Q s2β
2κ2T c2β
b4 → H + t
2κ2Q c2β
2λ2B s2β
Table 2. Leading dependence of the t4 and b4 decay widths on the Lagrangian parameters in the large mass limit. We use the shorthand notation sβ = sin β and cβ = cos β.
Couplings to Hu only
Couplings to Hd only
Couplings to Hu and Hd
doublet
singlet
doublet
singlet
BR(t4 → W + b)
0
1/2
1
0
BR(t4 → Zt)
1/2
1/4
0
0
t2β x 2 1+x(t2β −1)
1/4
BR(t4 → ht)
1/2
1/4
0
0
t2β x 2 1+x(t2β −1)
1/4
BR(b4 → W + t)
1
0
0
1/2
t2β 1+x(t2β −1)
1/2
BR(b4 → Zb)
0
0
1/2
1/4
1−x 1 2 1+x(t2β −1)
1/4
BR(b4 → hb)
0
0
1/2
1/4
1−x 1 2 1+x(t2β −1)
1/4
doublet (1−x)
x
1 1+x(t2β −1)
singlet 1/2
Table 3. Vectorlike quark branching ratios in the Goldstone boson equivalence limit. When couplings to both Hu and Hd are present the branching ratios are functions of tβ = tan β and x = κ2Q /(κ2Q + λ2Q ).
–2–
JHEP10(2020)058
64π m t4
Couplings to Hu only Couplings to Hd only Couplings to Hu and Hd singlet
doublet
singlet
doublet
singlet
BR(t4 → W + b)
0
2t2β 4t2β +1
1
0
2(1−x) 2+x(2t2β −1)
2t2β 4t2β +1
BR(t4 → Zt)
t2β 2 2tβ +1
t2β 2 4tβ +1
0
0
xt2β 2+x(2t2β −1)
t2β 2 4tβ +1
BR(t4 → ht)
t2β 2t2β +1
t2β 4t2β +1
0
0
xt2β 2+x(2t2β −1)
t2β 4t2β +1
BR(t4 → Ht)
1 2t2β +1
1 4t2β +1
0
0
x 2+x(2t2β −1)
1 4t2β +1
BR(b4 → W + t)
1
0
0
2 t2β +4
2xt2β t2β +2+x(t2β −2)
2 t2β +4
BR(b4 → Zb)
0
0
1 t2β +2
1 t2β +4
1−x t2β +2+x(t2β −2)
1 t2β +4
BR(b4 → hb)
0
0
1 t2β +2
1 t2β +4
1−x t2β +2+x(t2β −2)
1 t2β +4
BR(b4 → Hb)
0
0
t2β 2 tβ +2
t2β 2 tβ +4
(1−x)t2β 2 tβ +2+x(t2β −2)
t2β 2 tβ +4
Table 4. Branching ratio
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