Search for new physics in events with jets, b-tagged jets, and large missing transverse momentum in the all-hadronic channel at sqrt(s) = 13 TeV

A search for new physics in events with jets, b-tagged jets, missing transverse momentum, and no leptons, corresponding to an integrated luminosity of 35.9 fb-1 collected by the CMS experiment at sqrt(s) = 13 TeV, is presented. No significant excess of events on top of the standard model background expectation is observed. Results are interpreted in terms of a number of simplified supersymmetry models featuring squark and gluino production, and in terms of the pMSSM-19. For simplified models, lower limits on the gluino (squark) mass are established in the range 1.80-1.95 TeV (1.00-1.05 TeV), assuming a massless lightest supersymmetric particle.

Left–left squark mixing, $K^+\rightarrow \pi^+\nu\bar{\nu}$ and minimal supersymmetry with largetanβ

We analyze the role of the left–left squark mixing in the rare [Formula: see text] decay within the minimal supersymmetry with a large tan β. A Higgs boson mass of 125 GeV has been taken into account leading to correlation between stop masses and trilinear soft supersymmetry breaking coupling [Formula: see text]. We find that measurable effects, similar to that of the well known LR squark mixing terms, are possible for large [Formula: see text] combined with the off-diagonal LL-insertions. Precise measurements of the decay rate are expected from the ongoing NA62 experiment at CERN. We emphasize that the effect we present can put certain limits on the left–left flavor changing structure of the squark mass matrix.

NEUTRON ELECTRIC DIPOLE MOMENT AND FLAVOR CHANGING INTERACTIONS IN SUPERSYMMETRIC THEORIES

Supersymmetric contributions to the neutron electric dipole moment (EDM) are studied by taking account of the flavor changing interactions. We found that the gluino contribution is sensitive to the flavor changing interaction. Enhancement of neutron EDM via flavor mixing effects is possible when the squark mass difference between the different generations is sizable. As an example, the results of the SUSY SU (5) GUT with right-handed neutrinos are briefly discussed.

THE MASS OF A QUARK–SQUARK BOUND STATE FROM QCD SUM RULES

We give an estimate of the expected mass range for a possible two-quark two-squark bound state, using QCD sum rules. The sum rules are modified, taking mass effects into account, so that a treatment of heavy squarks becomes justified. The influence of the higher-order mass corrections and the possibility of a bound state mass below the squark mass are discussed.