QCD analysis of first b cross section data at 1.96TeV
نویسندگان
چکیده
The first data on bottom quark production in pp̄ collisions at 1.96 TeV have recently been obtained by the CDF collaboration. These data probe the region of pT ∼ 0, providing a new invaluable input on the issue of the compatibility between next-to-leadingorder (NLO) QCD and data. We reconsider the evaluation of the b cross section, in view of recent theoretical developments, and of the latest inputs on structure function fits. We show that the new CDF measurements are in good agreement with NLO QCD. If CDF preliminary data are confirmed, a long-standing discrepancy between NLO QCD predictions and hadron-collider data can be settled.
منابع مشابه
Measurement of the cross section for prompt isolated diphoton production in pp collisions at s=1.96TeV
Citation Aaltonen, T. et al. " Measurement of the cross section for prompt isolated diphoton production in pp[over ¯] collisions at sqrt[s]=1.96TeV. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access ...
متن کاملar X iv : h ep - e x / 04 11 02 5 v 1 5 N ov 2 00 4 Recent Run II QCD Results from DØ
We present recent QCD results from the DØ experiment at the Fermilab Tevatron Collider in pp̄ collisions at √ s = 1.96TeV. Results are presented for the inclusive jet and dijet cross sections, a measurement of dijet azimuthal decorrelations, studies of elastic scattering, and a search for diffractively produced Z bosons. INTRODUCTION The center-of-mass energy for proton-antiproton (pp̄) collision...
متن کاملB Physics at CDF
Due to the large bb cross section at 1.96TeV p− p̄ collisions, the Tevatron is currently the most copious source of B hadrons. Recent detector upgrades for Run II have made these more accessible, allowing for a wide range of B and 6 CP physics with B hadrons of all flavours. In this paper we present B-physics results, and, using the versatile hadronic Two Track Trigger, a search for Ξ(1860), fro...
متن کاملTransverse Momentum Cross Section of E[superscript +]e[superscript -] Pairs in the Z-boson Region from Pp Collisions at S=1.96tev Accessed Terms of Use
Citation Aaltonen, T. et al. " Transverse momentum cross section of e[superscript +]e[superscript-] pairs in the Z-boson region from pp collisions at s=1.96TeV. " Physical Review D 86.5 (2012). Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
متن کاملواپاشیهای پنگوئن درکوارک b
In this research, we are going to study the QCD penguin structure and calculate the second order approximation. The amplitude of decays related to QCD penguin in the quark model up to the first and second orders were calculated. We calculated the amplitude of QCD penguin on lowest order of αs for the first order of the decay processes b→qkg→qkqiqj and for the second order of the decay processes...
متن کامل