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Publication Detail
The FP420 R&D project: Higgs and New Physics with forward protons at the LHC
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Albrow MG, Appleby RB, Arneodo M, Atoian G, Azhgirey IL, Barlow R, Bayshev IS, Beaumont W, Bonnet L, Brandt A, Bussey P, Buttar C, Butterworth JM, Carter M, Cox BE, Dattola D, Da Via C, De Favereau J, D'Enterria D, De Remigis P, De Roeck A, De Wolf EA, Duarte P, Ellis JR, Florins B, Forshaw JR, Freestone J, Goulianos K, Gronberg J, Grothe M, Gunion JF, Hasi J, Heinemeyer S, Hollar JJ, Houston S, Issakov V, Jones RM, Kelly M, Kenney C, Khoze VA, Kolya S, Konstantinidis N, Kowalski H, Larsen HE, Lemaitre V, Liu SL, Lyapine A, Loebinger FK, Marshall R, Martin AD, Monk J, Nasteva I, Nemegeer P, Obertino MM, Orava R, O'Shea V, Ovyn S, Pal A, Parker S, Pater J, Perrot AL, Pierzchala T, Pilkington AD, Pinfold J, Piotrzkowski K, Plano W, Poblaguev A, Popov V, Potter KM, Roncarolo F, Rostovtsev A, Rouby X, Ruspa M, Ryskin MG, Santoro A, Schul N, Sellers G, Solano A, Spivey S, Stirling WJ, Swoboda D, Tasevsky M, Thompson R, Tsang T, Van Mechelen P, Vilela Pereira A, Watts SJ, Warren MRM, Weiglein G, Wengler T, White SN, Winter B, Yao Y, Zaborov D, Zampieri A, Zeller M, Zhokin A
  • Publication date:
  • Journal:
    Journal of Instrumentation
  • Volume:
  • Issue:
  • Status:
  • Print ISSN:
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+φ+p, in which the outgoing protons remain intact and the central system φ may be a single particle such as a SM or MSSM Higgs boson. Other physics topics discussed are γγ and γp 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 bb̄ 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. © 2009 IOP Publishing Ltd and SISSA.
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