Timely phenomenological studies relevant to the LHC

• Grant number: 12/05469-4
• Support Opportunities: 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 Investigator: Fernando Silveira Navarra
• Grantee: Emmanuel Gräve de Oliveira
• Supervisor: Alan Douglas Martin
• Host 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)

Scientific publications

(7)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BASSO, E. A. F.; GAY DUCATI, M. B.; DE OLIVEIRA, E. G.. Inclusive hadron and photon production at the LHC in dipole momentum space. Physical Review D, v. 87, n. 7, APR 23 2013. (12/05469-4)

DE OLIVEIRA, E. G.; MARTIN, A. D.; RYSKIN, M. G.; SHUVAEV, A. G.. Treatment of heavy quarks in QCD. EUROPEAN PHYSICAL JOURNAL C, v. 73, n. 10, OCT 25 2013. (12/05469-4)

DE OLIVEIRA, E. G.; MARTIN, A. D.; RYSKIN, M. G.. Physical factorisation scheme for PDFs for non-inclusive applications. Journal of High Energy Physics, n. 11, NOV 20 2013. (12/05469-4)

MACHADO, C. S.; NAVARRA, F. S.; DE OLIVEIRA, E. G.; NORONHA, J.; STRICKLAND, M.. Heavy quarkonium production in a strong magnetic field. Physical Review D, v. 88, n. 3, AUG 6 2013. (11/05619-3, 12/05469-4)

DE OLIVEIRA, E. G.; MARTIN, A. D.; RYSKIN, M. G.. Improving the Drell-Yan probe of small x partons at the LHC via a k(t) cut. EUROPEAN PHYSICAL JOURNAL C, v. 73, n. 3, MAR 2013. (12/05469-4)

DE OLIVEIRA, E. G.; MARTIN, A. D.; NAVARRA, F. S.; RYSKIN, M. G.. Unintegrated parton distributions in nuclei. Journal of High Energy Physics, n. 9, SEP 30 2013. (12/05469-4)

DE OLIVEIRA, E. G.; MARTIN, A. D.; RYSKIN, M. G.. Treatment of the infrared contribution: NLO QED evolution as a pedagogic example. EUROPEAN PHYSICAL JOURNAL C, v. 73, n. 8, AUG 2013. (12/05469-4)