Compact Muon Solenoid
LHC, CERN
Visit us: CMS Public Website, CMS Physics ;
Contact us: CMS Publications Committee
| CMS-EXO-12-032 ; CERN-PH-EP-2014-190 | ||
| Search for pair production of third-generation scalar leptoquarks and top squarks in proton-proton collisions at $\sqrt{s}$ = 8 TeV | ||
| CMS Collaboration | ||
| 4 August 2014 | ||
| Phys. Lett. B 739 (2014) 229 | ||
| Abstract: A search for pair production of third-generation scalar leptoquarks and supersymmetric top quark partners, top squarks, in final states involving $\tau$ leptons and bottom quarks is presented. The search uses events from a data sample of proton-proton collisions corresponding to an integrated luminosity of 19.7 fb$^{-1}$ collected with the CMS detector at the LHC with $\sqrt{s}$ =8 TeV. The number of observed events is found to be in agreement with the expected standard model background. Third-generation scalar leptoquarks with masses below 740 GeV are excluded at 95% confidence level, assuming a 100% branching fraction for the leptoquark decay to a $\tau$ lepton and a bottom quark. In addition, this mass limit applies directly to top squarks decaying via an R-parity violating coupling $\lambda^{\prime}_{333}$. The search also considers a similar signature from top squarks undergoing a chargino-mediated decay involving the R-parity violating coupling $\lambda^{\prime}_{3jk}$. Each top squark decays to a $\tau$ lepton, a bottom quark, and two light quarks. Top squarks in this model with masses below 580 GeV are excluded at 95% confidence level. The constraint on the leptoquark mass is the most stringent to date, and this is the first search for top squarks decaying via $\lambda^{\prime}_{3jk}$. | ||
| Links: e-print arXiv:1408.0806 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; HepData record ; CADI line (restricted) ; | ||
| Figures | |
png pdf |
Figure 1:
|
png pdf |
Figure 2:
|
png pdf |
Figure 3:
|
png pdf |
Figure 4:
|
png pdf |
Figure 5:
|
|
|
Compact Muon Solenoid LHC, CERN |
|
|
|
|
|
|