{"product_id":"determination-of-alpha_s-via-the-differential-2-jet-rate-with-atlas-at-lhc-von-markus-lichtnecker","title":"Determination of alpha_s via the Differential 2-Jet-Rate","description":"\u003cp\u003eThe first determination of the strong coupling constant alpha_s via the differential 2-jet-rate in pp collisions at the LHC (at a center-of-mass-energy of 7 TeV) is presented. Data gathered by the ATLAS experiment are fitted by next-to-leading order (NLO) perturbative QCD predictions from calculations with the program NLOJET++. As an observable, the jet-flip-parameter from 3 to 2 reconstructed jets is investigated, using the infrared and collinear safe kT jet algorithm in the exclusive reconstruction mode. The jet-flip-parameters from real data are compared to simulated data from Monte Carlo generators. For the determination of alpha_s, real data have been corrected for the jet-energy-scale, whereas the calculations from NLOJET++ have been corrected for the influence of hadronization effects as well as the impact of the Underlying Event by applying bin-by-bin corrections. The fit between real data and the calculations from NLOJET++ yields a value of alpha_s(M_Z) = 0.120±0.001(stat.)±0.005(syst.), which is in very good agreement with the current world average.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783838128610\"\u003e\u003ch3\u003ewith ATLAS at LHC\u003c\/h3\u003e\u003c\/div\u003e","brand":"Libri","offers":[{"title":"Softcover - 9783838128610","offer_id":39441227579485,"sku":"9783838128610","price":69.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/4cb0628b-a66f-4578-a0ff-81f6eec4c06f.jpg?v=1776316110","url":"https:\/\/shop.autorenwelt.de\/products\/determination-of-alpha_s-via-the-differential-2-jet-rate-with-atlas-at-lhc-von-markus-lichtnecker","provider":"Autorenwelt Shop","version":"1.0","type":"link"}