منابع مشابه
Search for top squarks at the Fermilab Tevatron collider.
The lighter superpartner of the top quark (t̃1) may be considerably lighter than squarks of the first two generations, and hence may be accessible to Tevatron collider searches, even if the other squarks and the gluino are too heavy. For the range of mt̃1 of interest at the Tevatron, the t̃1 decays to a chargino via t̃1 → bW̃1 if this is kinematically allowed; otherwise, the flavorchanging loop deca...
متن کاملThree–Body Decays of Top and Bottom Squarks
We investigate the decays of third generation scalar quarks in the Minimal Supersymmetric extension of the Standard Model, focusing on the three–body modes. We calculate the partial widths of the decays of heavier top and bottom squarks into the lighter ones and a fermion pair [through virtual vector boson, Higgs boson or gaugino exchanges] and the partial widths of the three–body decays of bot...
متن کاملShould Squarks Be Degenerate?
For generic squark masses, box diagrams with squarks and gluinos give unacceptably large contributions to neutral meson (K, B and D) mixing. The standard solution to this problem is to assume that squarks are degenerate to a very good approximation. We suggest an alternative mechanism to suppress squark contributions to flavor changing neutral currents: the alignment of quark with squark mass m...
متن کاملCan multi - TeV ( top and other ) squarks be natural in gauge mediation ? 1
We investigate whether multi-TeV (1 − 3 TeV) squarks can be natural in models of gauge mediated SUSY breaking. The idea is that for some boundary condition of the scalar (Higgs and stop) masses, the Higgs (mass)2, evaluated at the renormalization scale ∼ O(100) GeV, is not very sensitive to (boundary values of) the scalar masses (this has been called “focussing” in recent literature). Then, the...
متن کاملQuarks , Squarks and Textures
By studying symmetric mass textures for the up and down quark sectors, and expanding in a small parameter λ ∼ sinθC, bounds are set on entries commonly assumed to vanish. Consequences of a 2 + 1 family structure which can result from horizontal symmetry are examined. Generalizing to squarks, we study suppression of Flavor Changing Neutral Currents by mass degeneracy and/or small mixing angles. ...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2020
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.125.151801