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Experimental Setup

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Book cover Measurement of Quarkonium Polarization to Probe QCD at the LHC

Part of the book series: Springer Theses ((Springer Theses))

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Abstract

This chapter is dedicated to introducing the experimental setup used to obtain the results discussed in Chap. 4, which are based on data collected in pp collisions at the CMS detector in the years 2011 and 2012. The LHC is briefly introduced in Sect. 3.1, followed by a more detailed introduction of the CMS experiment in Sect. 3.2, highlighting the parts of the detector, data acquisition chain and reconstruction software that are relevant for the analyses discussed in this thesis, based on the \(\mu \mu \) final state. No generic details shall be discussed here, all relevant additional information can be found in the extensive documentation describing the LHC (Evans and Bryant, J Instrum 3:S08001, 2008, [1]) and the CMS detector (CMS Collaboration. CMS Physics Technical Design Report Volume I: Detector Performance and Software, 2006, [2], CMS Collaboration. J Phys G Nucl Part Phys 34:995, 2007, [3], CMS Collaboration. J Instrum 3:S08004, 2008, [4].

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Notes

  1. 1.

    The run periods at 7 and 8 TeV are denoted as “Run I”, while the run at 13 TeV starting in 2015 is referred to as “Run II”.

  2. 2.

    \(L=10^{34}\;\)cm\(^{-2}\)s\(^{-1}\) can also be written as 10 Hz/nb, with 1b\(=10^{-24}\) cm\(^2\).

  3. 3.

    These effects are taken into account in all mentioned extrapolations of track trajectories in between detector layers or in between subdetector systems, even though not mentioned explicitly in each occurrence.

  4. 4.

    Given that the modes of the decay time distributions of the prompt and non-prompt charmonia are both at 0, they can not be distinguished on an event-by-event basis.

  5. 5.

    The word “pseudo” refers to the fact that the kinematics of the decaying B hadrons are not reconstructed, but approximated by the dimuon kinematics.

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Authors and Affiliations

  1. Experimental Physics Department, CERN, Geneva, Switzerland

    Valentin Knünz

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  1. Valentin Knünz
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Correspondence to Valentin Knünz .

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Knünz, V. (2017). Experimental Setup. In: Measurement of Quarkonium Polarization to Probe QCD at the LHC. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-319-49935-2_3

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