Title The FP420 R&D project: Higgs and new physics with forward protons at the LHCThe FP420 R&D project: Higgs and new physics with forward protons at the LHC Author Albrow, M.G. Beaumont, W. De Roeck, A. de Wolf, E.A. Van Mechelen, P. et al. Faculty/Department Faculty of Sciences. Physics Research group Elementary Particle Physics Publication type article Publication 2009Bristol :Institute of Physics, 2009 Subject Physics Source (journal) Journal of instrumentation. - Bristol, 2006, currens Volume/pages 4(2009), p. T10001,1-T10001,168 ISSN 1748-0221 ISI 000273341100016 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp Abstract We present the FP420 R&D project, which has been studying the key aspects of the development and installation of a silicon tracker and fast-timing detectors in the LHC tunnel at 420 m from the interaction points of the ATLAS and CMS experiments. These detectors would measure precisely very forward protons in conjunction with the corresponding central detectors as a means to study Standard Model (SM) physics, and to search for and characterise new physics signals. This report includes a detailed description of the physics case for the detector and, in particular, for the measurement of Central Exclusive Production, pp¨p++p, in which the outgoing protons remain intact and the central system may be a single particle such as a SM or MSSM Higgs boson. Other physics topics discussed are ÁÁ and Áp interactions, and diffractive processes. The report includes a detailed study of the trigger strategy, acceptance, reconstruction efficiencies, and expected yields for a particular pp¨pHp measurement with Higgs boson decay in the b mode. The document also describes the detector acceptance as given by the LHC beam optics between the interaction points and the FP420 location, the machine backgrounds, the new proposed connection cryostat and the moving (Hamburg'') beam-pipe at 420 m, and the radio-frequency impact of the design on the LHC. The last part of the document is devoted to a description of the 3D silicon sensors and associated tracking performances, the design of two fast-timing detectors capable of accurate vertex reconstruction for background rejection at high-luminosities, and the detector alignment and calibration strategy. E-info http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000273341100016&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000273341100016&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000273341100016&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle