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- W52783164 abstract "Top quark was discovered at Fermilab in the 1995-96 [1], completing the three-families structure of the Standard Model (SM) and opening the new field of top quark physics. Since the beginning of the study phase, this object has appeared to be a very special one. Top quark is distinguished by a large mass (172.4 ± 0.7 (stat) ± 1.0 (syst)GeV, [2]) that is intriguingly close to the scale of electroweak (EW) and a Yukawa coupling surprisingly close to 1. Within the Minimal Standard Model, top quark processes are known with high accuracy with no need for phenomenological parameters, decay occurs mostly through the t → bW channel and, since the top mass width is larger than the QCD scale, no top-hadrons are formed. These unique properties suggest that the top quark can be considered a very clean laboratory where to constrain the SM and to look beyond it. Several properties of the top quark have already been examined at the pp collider Tevatron at Fermilab (up to now the only place where it is directly produced), e±p collider HERA at DESY and e+e− collider LEP at CERN. Despite the very important reaches and limits of these measurements, most of them suffer from the small sample of top quarks collected. It is here that the Large Hadron Collider (LHC) comes into the game. Whereas the center-of-mass energy at LHC is seven times higher than the Tevatron, the cross section for tt production is more than a hundred times larger and amounts to 833± 83 (PDF)± 50 (stat) pb at next-to-leading order [3]. This large cross section, combined with the significantly enhanced single-top production, implies that during the stable low-luminosity run (L = 2× 1033cm−2s−1) a rate around 4 top quarks per second will be reached. About 800,000 events will be likely obtained after 1 fb−1," @default.
- W52783164 created "2016-06-24" @default.
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- W52783164 date "2009-01-01" @default.
- W52783164 modified "2023-09-23" @default.
- W52783164 title "BSM measurements with Top at LHC : CMS sensitivity to Flavour Changing Neutral Currents" @default.
- W52783164 hasPublicationYear "2009" @default.
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