The cross sections for the production of tt¯bb¯ and tt¯jj events and their ratio σtt¯bb¯/σtt¯jj are measured using data corresponding to an integrated luminosity of 2.3 fb−1collected in pp collisions at s=13 TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and at least four reconstructed jets, including at least two

A search for dark matter is performed looking for events with large missing transverse momentum and a Higgs boson decaying either to a pair of bottom quarks or to a pair of photons. The data from proton-proton collisions at a center-of-mass energy of 13 TeV, collected in 2015 with the CMS detector at the LHC, correspond to an integrated luminosity

Results are presented from a search for natural gauge-mediated supersymmetry (SUSY) in a scenario in which the top squark is the lightest squark, the next-to-lightest SUSY particle is a bino-like neutralino, and the lightest SUSY particle is the gravitino. The strong production of top squark pairs can produce events with pairs of top quarks and neu

A search is presented for heavy vectorlike quarks (VLQs) that couple only to light quarks in protonproton collisions at ffiffi s p ¼ 8 TeV at the LHC. The data were collected by the CMS experiment during 2012 and correspond to an integrated luminosity of 19.7 fb−1. Both single and pair production of VLQs are considered. The single-production sea

A search for single production of vector-like quarks, T and B, decaying into a Z boson and a top or a bottom quark, respectively, is presented. The search is performed using data collected by the CMS experiment at the LHC in proton-proton collisions at √ s = 13 TeV, corresponding to an integrated luminosity of 2.3 fb−1 . An exotic T quark produ

The relative yields of ϒ mesons produced in pp and Pb-Pb collisions at ffiffiffiffiffiffiffi sNN p ¼ 5.02 TeV and reconstructed via the dimuon decay channel are measured using data collected by the CMS experiment. Double ratios are formed by comparing the yields of the excited states, ϒð2SÞ and ϒð3SÞ, to the ground state, ϒð1SÞ, in both

A search for pair production of heavy scalar leptoquarks (LQs), each decaying into a top quark and a τ lepton, is presented. The search considers final states with an electron or a muon, one or two τ leptons that decayed to hadrons, and additional jets. The data were collected in 2016 in proton–proton collisions at √s = 13 TeV with the CMS de

الحكم الرشيد، أو الحوكمة الرشيدة أو الحكم الراشد مترادفات تعني نظام الحكم المبني على أساس متين بغية خدمة الأمة، وهو مصطلح جديد ظهر في الغرب منذ عقدين تقريبا، مع أن جذوره وما ينطوي عليه قديمة ق�

Bio-pellet is an important fuel for sustainable energy in future and a potential renewable energy substitute for rural areas, East Java of Indonesia in particular. One of the candidates for solid fuel is coffee husk pellets, it is a bio-product produced from coffee production waste. In this research, focus is on hole design of stove that could be u

This Letter presents the observation of the rare Z boson decay Z → ψlþl−. Here, ψ represents contributions from direct J=ψ and ψð2SÞ → J=ψX, lþl− is a pair of electrons or muons, and the J=ψ meson is detected via its decay to μþμ−. The sample of proton-proton collision data, collected by the CMS experiment at the LHC at a cen