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In supersymmetric models with light higgsinos (which are motivated by electroweak naturalness arguments), the direct production of higgsino pairs may be difficult to search for at LHC due to the low visible energy release from their decays. However, the wino pair production reaction tw_2^pmtz_4to (W^pmtz_{1,2})+(W^pmtw_1^mp) also occurs at substantial rates and leads to final states including equally opposite-sign (OS) and same-sign (SS) diboson production. We propose a novel search channel for LHC14 based on the SS diboson plus missing E_T final state which contains only modest jet activity. Assuming gaugino mass unification, and an integrated luminosity > 100 fb^{-1}, this search channel provides a reach for SUSY well beyond that from usual gluino pair production.
Naturalness arguments applied to simple supersymmetric (SUSY) theories require a set of light higgsinos with mass $sim |mu|$ not too far from $m_h$. These models have an inverted electroweakino spectrum with $|mu| ll M_2$ which leads to a rather clea
We investigate the prospect of searching for new physics via the novel signature of same-sign diboson + ${E!!!!/}_{T}$ at current and future LHC. We study three new physics models: (i) natural SUSY models, (ii) type-III seesaw model and (iii) type-II
We study the polarization of positively charged $W$s in the scattering of massive electroweak bosons at hadron colliders. We rely on the separation of weak boson polarizations in the gauge-invariant, doubly-resonant part of the amplitude in Monte Car
In models of maximal flavor violation (MxFV) there is at least one new scalar $Phi_{FV}$ which couples to the quarks via $Phi_{FV} q_i q_j propto xi_{ij}$ where $xi_{i3},xi_{3i} sim V_{tb}$ for $i = 1,2$ and $xi_{33} sim V_{td}$ and $V$ is the CKM ma
We use the current CMS and ATLAS data for the leptonic $pp to WW, WZ$ channels to show that diboson production is, for a broad class of flavour models, already competitive with LEP-1 measurements for setting bounds on the dimension six operators para