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The FP420 R&D project: Higgs and New Physics with forward protons at the LHC

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M G Albrow1, R B Appleby2, M Arneodo3, G Atoian4, I L Azhgirey5, R Barlow2, I S Bayshev5, W Beaumont6, L Bonnet7, A Brandt8, P Bussey9, C Buttar9, J M Butterworth10, M Carter11, B E Cox2, D Dattola12, C Da Via13, J de Favereau7, D d'Enterria14, P De Remigis12, A De Roeck14,6, E A De Wolf6, P Duarte8, J R Ellis14, B Florins7, J R Forshaw13, J Freestone13, K Goulianos15, J Gronberg16, M Grothe17, J F Gunion18, J Hasi13, S Heinemeyer19, J J Hollar16, S Houston9, V Issakov4, R M Jones2, M Kelly13, C Kenney20, V A Khoze21, S Kolya13, N Konstantinidis10, H Kowalski22, H E Larsen23, V Lemaitre7, S -L Liu24, A Lyapine10, F K Loebinger13, R Marshall13, A D Martin21, J Monk10, I Nasteva13, P Nemegeer7, M M Obertino3, R Orava25, V O'Shea9, S Ovyn7, A Pal8, S Parker20, J Pater13, A -L Perrot26, T Pierzchala7, A D Pilkington13, J Pinfold24, K Piotrzkowski7, W Plano13, A Poblaguev4, V Popov27, K M Potter2, F Roncarolo2, A Rostovtsev27, X Rouby7, M Ruspa3, M G Ryskin21, A Santoro29, N Schul7, G Sellers2, A Solano23, S Spivey8, W J Stirling21, D Swoboda26, M Tasevsky30, R Thompson13, T Tsang28, P Van Mechelen6, A Vilela Pereira23, S J Watts13, M R M Warren10, G Weiglein21, T Wengler13, S N White28, B Winter11, Y Yao24, D Zaborov27, A Zampieri12, M Zeller4 and A Zhokin6,27

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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, ppp+phi+p, in which the outgoing protons remain intact and the central system phi 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 pppHp measurement with Higgs boson decay in the bbar 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.

Keywords

Cherenkov detectors

Mass spectrometers

Particle tracking detectors

Spectrometers

Timing detectors

 

E-print Number: 0806.0302

Cited: by |

Refers: to

PACS

29.40.Wk Solid-state detectors

14.40.Cs Other mesons with S=C=0, mass<2.5 GeV

29.40.Gx Tracking and position-sensitive detectors

12.60.Jv Supersymmetric models

14.80.Cp Non-standard-model Higgs bosons

13.85.Ni Inclusive production with identified hadrons

Subjects

Accelerators, beams and electromagnetism

Nuclear physics

Instrumentation and measurement

Particle physics and field theory

Dates

Issue 10 (October 2009)

Received 31 December 2008, accepted for publication 24 August 2009

Published 1 October 2009



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