2010/02/28 by Aoife Bharucha, William Reece · 1 citation
Mathematics · Physics and Astronomy · #Computer science #Distribution (mathematics) #Hadron #High-Energy Particle Collisions Research #Large Hadron Collider #Limit (mathematics) #Luminosity #Mathematical analysis #Mathematics #Measure (data warehouse) #Nuclear physics #Observable #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #RADIUS #Recoil #Sensitivity (control systems) #Standard Model (mathematical formulation) #Statistics #hep-ex #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-010-1433-0
published as Eur.Phys.J.C69:623-640,2010 · 32 pages, 9 figures, 9 tables. v2: Figure caption corrected and 2 references added. Version submitted to journal.
arxiv created 2010/03/16 · openalex publication_date 2010/09/13 · arxiv updated 2015/03/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the observables available in the angular distribution of B→K ∗ μ + μ − to identify those suitable for measurements in the first few years of LHC data taking. There are three observables that may be extracted by counting signal events as a function of one or two decay angles and correspond to large features of the full angular distribution in the Standard Model: A FB, F L, and S 5. Two of these are well known in the experimental community; however, we show that measuring S 5 adds complementary sensitivity to physics beyond the Standard model. Like A FB, it features a zero-crossing point with reduced hadronic uncertainties at leading order and in the large recoil limit. Due to the high gradient of S 5 at this point, we find it would be possible for LHCb to measure it to high precision. Current experimental model independent constraints on parameter space are presented and predictions made for the values of the A FB and S 5 zero-crossing points. The relative impact of early LHCb measurements of A FB, F L, and S 5 is assessed. These issues are explored with a new model of the decay that can be used with standard simulation tools such as EvtGen.