TY - JOUR
T1 - Threshold corrections to mb and the bb̄ → H i0 production in CP-violating SUSY scenarios
AU - Borzumati, Francesca
AU - Lee, Jae Sik
AU - Song, Wan Young
N1 - Funding Information:
Discussions with A. Pilaftsis and A. Pomarol are acknowledged. F.B. was partially supported by the Japanese Society for Promotion of Science; J.S.L. by the Japanese Society for Promotion of Science and PPARC; W.Y.S. by the KRF PBRG 2002-070-C00022 and KRF Grant 2000-015-DP0080. The hospitality of the theory groups of KEK, the University of Barcelona, and the Yokohama National University is acknowledged.
PY - 2004/8/12
Y1 - 2004/8/12
N2 - The inclusion of supersymmetric threshold corrections to the b-quark mass has dramatic consequences in scenarios with large CP-mixing effects in the Higgs sector. In particular, when the phase of the combination M g̃μ is ∼180°±30°, the lightest sbottom squark becomes tachyonic and, possibly, the b-quark Yukawa coupling nonperturbative for values of tanβ ranging from intermediate up to large or very large, depending on the size of arg(Atμ), arg(A bμ), and the details of the spectrum. For these scenarios, when allowed, as well as scenarios with different values of arg(M g̃μ), the cross sections for the production of the three neutral Higgs bosons through b-quark fusion have interesting dependences on arg(Atμ) and arg(Abμ), and the deviations induced by the mb corrections are rather large. In general, such production channel cannot be neglected with respect to the production through gluon fusion. For large CP-mixing effects, the lightest neutral Higgs boson can be mainly CP odd and the b-quark fusion becomes its main production mechanism. Searches at the Tevatron and the LHC can easily detect such a Higgs boson, or constrain the CP-violating scenarios that allow it.
AB - The inclusion of supersymmetric threshold corrections to the b-quark mass has dramatic consequences in scenarios with large CP-mixing effects in the Higgs sector. In particular, when the phase of the combination M g̃μ is ∼180°±30°, the lightest sbottom squark becomes tachyonic and, possibly, the b-quark Yukawa coupling nonperturbative for values of tanβ ranging from intermediate up to large or very large, depending on the size of arg(Atμ), arg(A bμ), and the details of the spectrum. For these scenarios, when allowed, as well as scenarios with different values of arg(M g̃μ), the cross sections for the production of the three neutral Higgs bosons through b-quark fusion have interesting dependences on arg(Atμ) and arg(Abμ), and the deviations induced by the mb corrections are rather large. In general, such production channel cannot be neglected with respect to the production through gluon fusion. For large CP-mixing effects, the lightest neutral Higgs boson can be mainly CP odd and the b-quark fusion becomes its main production mechanism. Searches at the Tevatron and the LHC can easily detect such a Higgs boson, or constrain the CP-violating scenarios that allow it.
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U2 - 10.1016/j.physletb.2004.06.040
DO - 10.1016/j.physletb.2004.06.040
M3 - Article
AN - SCOPUS:3843060010
VL - 595
SP - 347
EP - 358
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 1-4
ER -