Abstract

Forward physics to be investigated with CMS at the LHC includes a wide range of topics, including low-x QCD, diffractive scattering, and constraints of cosmic ray Monte Carlo predictions for multi-particle production. We describe the forward detection instrumentation around the CMS interaction point and present selected feasibility studies to illustrate the physics potential.

Highlights

  • Forward physics to be investigated with CMS at the LHC includes a wide range of topics, including low-x QCD, diffractive scattering, and constraints of cosmic ray Monte Carlo predictions for multiparticle production

  • Forward instrumentation in the CMS experiment consists of the forward hadronic calorimeter (HF), the CASTOR and Zero Degree Calorimeter (ZDC) calorimeters

  • The Zero Degree Calorimeter (ZDC) is a quartz fiber and tungsten sampling calorimeter installed on both sides of IP5 at a distance of 140 m

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Summary

CASTOR

The CASTOR (Centauro and Strange Object Research) detector is a quartz-tungsten sampling calorimeter located 14.38 m from IP5 which will cover the pseudorapidity region 5.25 < |η| < 6.5. The Zero Degree Calorimeter (ZDC) is a quartz fiber and tungsten sampling calorimeter installed on both sides of IP5 at a distance of 140 m It will provide detection coverage in the pseudorapidity region |η| > 8.1 for neutrals and photons. Each ZDC is made up of separate electromagnetic (19 radiation lengths over 5 horizontal readout units) and hadronic (4 horizontal readout units) sectors over a total depth of 6.5 interaction lengths.

TOTEM and FP420
Diffraction
Single-diffractive W production
Single-diffractive dijet production
Low-x QCD
Forward jets in HF
Exclusive dilepton production
Findings
Constraints on ultra-high energy cosmic ray interaction models
Full Text
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