منابع مشابه
Search for Excited Quarks in ep Collisions at HERA
A search for excited quarks is performed using the full ep data sample collected by the H1 experiment at HERA, corresponding to a total integrated luminosity of 475 pb. The electroweak decays of excited quarks q → qγ, q → qZ and q→qW with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for first generation excited quark production is found. Mass dependen...
متن کاملSearch for Excited Quarks in ep Collisions at HERA H1 Collaboration
A search for excited quarks is performed using the full ep data sample collected by the H1 experiment at HERA, corresponding to a total integrated luminosity of 475 pb. The electroweak decays of excited quarks q → qγ, q → qZ and q→qW with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for first generation excited quark production is found. Mass dependen...
متن کاملSearch for Excited Neutrinos at Hera
A search for excited neutrinos produced in electron–proton collisions is performed using a data sample corresponding to an integrated luminosity of 114 pb recently collected by the H1 detector at HERA. In absence of a signal, the measurement is interpreted within a minimal model parameterised in terms of couplings and compositness scale. New parameter regions, beyond other colliders sensitiviti...
متن کاملA QUARTIC POTENTIAL FOR THE NUCLEONIC QUARKS
We assume that each valence quark in a nucleon is in a phenomenological modified harmonic oscillator potential of the form: ( l+yo) (ar +br+cr +dr ), where a, b, c and d are constants and ? is one of the Dirac matrices. Then by making use of a suitable ansatz, the Dirac equation has a very simple solution which is exact. We then have calculated the static properties of the nucleon in the ...
متن کاملCombined search for the quarks of a sequential fourth generation
Results are presented from a search for a fourth generation of quarks produced singly or in pairs in a data set corresponding to an integrated luminosity of 5 fb 1 recorded by the CMS experiment at the LHC in 2011. A novel strategy has been developed for a combined search for quarks of the up and down type in decay channels with at least one isolated muon or electron. Limits on the mass of the ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1984
ISSN: 0370-2693
DOI: 10.1016/0370-2693(84)90930-4