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# Timely phenomenological studies relevant to the LHC

 Grant number: 12/05469-4 Support type: Scholarships abroad - Research Internship - Post-doctor Effective date (Start): October 01, 2012 Effective date (End): September 30, 2013 Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields Principal researcher: Fernando Silveira Navarra Grantee: Emmanuel Gräve de Oliveira Supervisor abroad: Alan Douglas Martin Home Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil Research place: Durham University (DU), England Associated to the scholarship: 11/50597-8 - Quantum chromodynamics in high energy collisions, BP.PD Abstract The LHC is producing a wealth of data on all aspects of particle physics and there are numerous projects of timely interest. We want to study the Drell-Yan production of low-mass high-rapidity lepton pairs, a process which is being observed by the LHCb experiment. We will develop a novel procedure showing that these data can measure the parton distribution functions of the proton in a very low x domain which previously has been unreachable by experiment. Parton distributions in this domain are extremely important as they drive the majority of proton-proton collisions at the LHC. Moreover, the theoretical framework that is currently used in this domain is expected to become inadequate. Experimental information from LHCb in this low $x$ domain will, for the first time, illuminate the correct theoretical approach, which will in turn, improve the knowledge of parton distributions which are necessary ingredients for extracting physics from all the LHC experiments. Furthermore, in our studies of the Drell-Yan process, we can introduce a cut on dilepton transverse momentum, to reduce the factorization scale. The next timely area is the study of bb(bar) production, where direct access to the low x gluon distribution is possible. Also, we may study the chi c(J=0,1,2) inclusive production, which will allow the study the region of rather low scales close to the starting DGLAP evolution value Q_0. (chi c(1,2)->J/psi+\gamma was already observed by LHCb.) (AU)