${{\widetilde{\mathit b}}}$ (Sbottom) mass limit

Limits in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ depend on the mixing angle of the mass eigenstate ${{\widetilde{\mathit b}}_{{{1}}}}$ = ${{\widetilde{\mathit b}}_{{{L}}}}$cos $\theta _{{{\mathit b}}}$ $+$ ${{\widetilde{\mathit b}}_{{{R}}}}$sin$\theta _{{{\mathit b}}}$. Coupling to the ${{\mathit Z}}$ vanishes for $\theta _{{{\mathit b}}}\sim{}1.17$. As a consequence, no absolute constraint in the mass region ${ {}\lesssim{} }$40 GeV is available in the literature at this time from ${{\mathit e}^{+}}{{\mathit e}^{-}}$ collisions. In the Listings below, we use $\Delta \mathit m$ = ${\mathit m}_{{{\widetilde{\mathit b}}_{{{1}}}}}–{\mathit m}_{{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}}$.
Some earlier papers are now obsolete and have been omitted. They were last listed in our PDG 2014 edition: K. Olive, $\mathit et~al.$ (Particle Data Group), Chinese Physics C38 070001 (2014) (http://pdg.lbl.gov).

R-parity violating ${{\widetilde{\mathit b}}}$ (Sbottom) mass limit

INSPIRE   JSON  (beta) PDGID:
S046SBV
VALUE (GeV) CL% DOCUMENT ID TECN  COMMENT
$\bf{> 307}$ 95 1
KHACHATRYAN
2016BX
 CMS RPV, ${{\widetilde{\mathit b}}}$ $\rightarrow$ ${{\mathit t}}{{\mathit d}}$ or ${{\mathit t}}{{\mathit s}}$, ${{\mathit \lambda}_{{{332}}}^{''}}$ or ${{\mathit \lambda}_{{{331}}}^{''}}$ coupling
• • We do not use the following data for averages, fits, limits, etc. • •
2
AAD
2014E
 ATLS ${{\mathit \ell}^{\pm}}{{\mathit \ell}^{\pm}}$( ${{\mathit \ell}^{\mp}}$) + jets, ${{\widetilde{\mathit b}}_{{{1}}}}$ $\rightarrow$ ${{\mathit t}}{{\widetilde{\mathit \chi}}_{{{1}}}^{\pm}}$ with ${{\widetilde{\mathit \chi}}_{{{1}}}^{\pm}}$ $\rightarrow$ ${{\mathit W}^{(*)\pm}}{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ simplified model, ${\mathit m}_{{{\widetilde{\mathit \chi}}_{{{1}}}^{\pm}}}$ = 2 ${\mathit m}_{{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}}$
1  KHACHATRYAN 2016BX searched in 19.5 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV for events containing 2 leptons coming from R-parity-violating decays of supersymmetric particles. No excess over the expected background is observed. Limits are derived on the sbottom mass, assuming the RPV ${{\widetilde{\mathit b}}}$ $\rightarrow$ ${{\mathit t}}{{\mathit d}}$ or ${{\widetilde{\mathit b}}}$ $\rightarrow$ ${{\mathit t}}{{\mathit s}}$ decay, see Fig. 15.
2  AAD 2014E searched in 20.3 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV for strongly produced supersymmetric particles in events containing jets and two same-sign leptons or three leptons. The search also utilises jets originating from ${{\mathit b}}$-quarks, missing transverse momentum and other variables. No excess over the expected SM background is observed. Exclusion limits are derived in simplified models containing bottom, see Fig. 7. Limits are also derived in the mSUGRA/CMSSM, bRPV and GMSB models, see their Fig. 8.
References