PHYS08200604017 Manimala Mitra - Homi Bhabha National Institute
PHYS08200604017 Manimala Mitra - Homi Bhabha National Institute
PHYS08200604017 Manimala Mitra - Homi Bhabha National Institute
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C H− ,L<br />
lν<br />
−T 11Y † l U 11 sinβ C H− ,R<br />
lν<br />
( √ 1<br />
2<br />
S 11Y † † Σ U 21 ∗ −S 21Y † ∗ Σ U ∗ 11 )cosβ<br />
C H− ,L<br />
lΣ<br />
−T 11Y † 0 l U 12 sinβ C H− ,R<br />
lΣ 0 ( √ 1<br />
2<br />
S 11Y † † Σ U 22 ∗ −S 21Y † ∗ Σ U ∗ 12 )cosβ<br />
C H+ ,L<br />
νΣ<br />
( 1 − √<br />
2<br />
U21Y T Σ S 12 −U11Y T T Σ S 22 )cosβ C H+ ,R<br />
νΣ − −U 11Y † †<br />
l T 12sinβ<br />
C H− ,L<br />
Σ − Σ<br />
−T 12Y † 0 l U 12 sinβ C H− ,R<br />
Σ − Σ 0 ( √ 1<br />
2<br />
S 12Y † † Σ U 22 ∗ −S 22Y † ∗ Σ U ∗ 12 )cosβ<br />
C G− ,L<br />
lν<br />
T 11Y † l U 11 cosβ C G− ,R<br />
lν<br />
( √ 1 2<br />
S 11Y † † Σ U 21 ∗ −S 21Y † ∗ Σ U ∗ 11 )sinβ<br />
C G− ,L<br />
lΣ<br />
T 11Y † 0 l U 12 cosβ C G− ,R<br />
lΣ 0 ( √ 1 2<br />
S 11Y † † Σ U 22 ∗ −S 21Y † ∗ Σ U ∗ 12 )sinβ<br />
C G+ ,L<br />
νΣ<br />
( 1 − √<br />
2<br />
U21Y T Σ S 12 −U11Y T T Σ S 22 )sinβ C G+ ,R<br />
νΣ − U 11Y † †<br />
l T 12cosβ<br />
C G− ,L<br />
Σ − Σ<br />
T 12Y † 0 l U 12 cosβ C G− ,R<br />
Σ − Σ 0 ( √ 1 2<br />
S 12Y † † Σ U 22 ∗ −S 22Y † ∗ Σ U ∗ 12 )sinβ<br />
Table 3.15: The vertex factors for P L (P R ) and their corresponding exact expression in<br />
termsoftheYukawacouplingsandmixingmatricesaregiveninthefirst(third)andsecond<br />
(forth) column respectively. The vertex factors listed here are for Yukawa interactions of<br />
the charged as well as neutral leptons with charged Higgs.<br />
where the first term is for heavy triplet fermion field and the second term contains the<br />
corresponding contributions from all standard model fields. The covariant derivative is<br />
defined as<br />
D µ = ∂ µ +ig[W µ ,Σ].<br />
(B13)<br />
Inserting the covariant derivative in Eq. (B12) one obtains the following interaction terms<br />
between leptons and gauge fields<br />
L int = L l,Σ−<br />
NC +Lν,Σ0 NC +L CC,<br />
(B14)<br />
where the first two terms contain the neutral current interactions between l ± andΣ ± (first<br />
term) and between ν and Σ 0 (second term) respectively. The last term gives the charged<br />
current interaction between the leptons. The neutral current interaction Lagrangian involving<br />
l and Σ − is given by<br />
where<br />
L l,Σ−<br />
NC<br />
= l m γ µ {c Z,R<br />
ll<br />
P R +c Z,L<br />
ll<br />
P L }l m Z µ +{l m γ µ {c Z,R<br />
lΣ<br />
P − R +c Z,L<br />
lΣ<br />
P − L }Σ − m Z µ +h.c}<br />
+Σ − m γµ {c Z,R<br />
Σ − Σ<br />
P − R +c Z,L<br />
Σ − Σ<br />
P − L }Σ − m Z µ,<br />
(B15)<br />
c Z,R<br />
ll<br />
c Z,R<br />
lΣ −<br />
c Z,R<br />
Σ − Σ −<br />
= g<br />
c w<br />
s 2 w (T† 11 T 11)−c w g(T † 21 T 21),<br />
= g<br />
c w<br />
s 2 w (T† 11T 12 )−c w g(T † 21T 22 ),<br />
= g<br />
c w<br />
s 2 w(T † 12T 12 )−c w g(T † 22T 22 ),<br />
(B16)<br />
81