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Report number arXiv:1808.08865 ; LHCB-PUB-2018-009 ; CERN-LHCC-2018-027 ; LHCC-G-171
Title Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era
Author(s) LHCb Collaboration  Show all 832 authors
Corporate author(s) LHCC
Publication 2016
Imprint 30 Aug 2018
Number of pages 178
Note ISBN 978-92-9083-494-6
DOI 10.17181/CERN.QZRZ.R4S6
Subject category hep-ex ; Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Project CERN HL-LHC
Abstract The LHCb Upgrade II will fully exploit the flavour-physics opportunities of the HL-LHC, and study additional physics topics that take advantage of the forward acceptance of the LHCb spectrometer. The LHCb Upgrade I will begin operation in 2020. Consolidation will occur, and modest enhancements of the Upgrade I detector will be installed, in Long Shutdown 3 of the LHC (2025) and these are discussed here. The main Upgrade II detector will be installed in long shutdown 4 of the LHC (2030) and will build on the strengths of the current LHCb experiment and the Upgrade I. It will operate at a luminosity up to 2×1034cm2s1, ten times that of the Upgrade I detector. New detector components will improve the intrinsic performance of the experiment in certain key areas. An Expression Of Interest proposing Upgrade II was submitted in February 2017. The physics case for the Upgrade II is presented here in more depth. CP-violating phases will be measured with precisions unattainable at any other envisaged facility. The experiment will probe bs+ and bd+ transitions in both muon and electron decays in modes not accessible at Upgrade I. Minimal flavour violation will be tested with a precision measurement of the ratio of B(B0μ+μ)/B(B0sμ+μ). Probing charm CP violation at the 105 level may result in its long sought discovery. Major advances in hadron spectroscopy will be possible, which will be powerful probes of low energy QCD. Upgrade II potentially will have the highest sensitivity of all the LHC experiments on the Higgs to charm-quark couplings. Generically, the new physics mass scale probed, for fixed couplings, will almost double compared with the pre-HL-LHC era; this extended reach for flavour physics is similar to that which would be achieved by the HE-LHC proposal for the energy frontier.
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Copyright/License report: © 2018-2024 CERN (License: CC-BY-4.0)
Submitted by cindy.denis@cern.ch

 


 Record created 2018-08-29, last modified 2024-08-17


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