Very light sbottom and gluino scenario confronting electroweak precision tests

Details Very light sbottom and gluino scenario confronting electroweak precision tests Very light sbottom and gluino scenario confronting electroweak precision tests

2002-05-02

arxiv.org/abs/hep-ph/0205013v2

Phys.Lett.B541:161-165,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 4 figures

Scientific paper

10.1016/S0370-2693(02)02218-9

The minimal supersymmetric model with light sbottom ($\sim m_b$) and light gluino (12 $\sim$ 16 GeV) can explain the excess of bottom quark production cross section at hadron colliders and has drawn much attention. We calculate one-loop contribution to Z-pole observable $R_b$ in this scenario when large CP violating phases are allowed in the gluino mass and/or sbottom sector. We show that these large CP violating phases can suppress the new contribution $\delta R_b$ safely within the experimental bounds even for heavier sbottom too heavy ($\wt{b}_2 \gtrsim$ 200 GeV) to be produced at LEP2 in association with light sbottom $\wt{b}_1$.

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