Application of vertex and mass constraints in track-based alignment

J. Amoraal; J. Blouw; S. Blusk; S. Borghi; M. Cattaneo; N. Chiapolini; G. Conti; M. Deissenroth; F. Dupertuis; R. Van Der Eijk; V. Fave; M. Gersabeck; A. Hicheur; W. Hulsbergen; D. Hutchcroft; A. Kozlinskiy; R. W. Lambert; F. MacIuc; R. Märki; M. Martinelli; M. Merk; M. Needham; L. Nicolas; J. Palacios; C. Parkes; A. Pellegrino; S. Pozzi; G. Raven; E. Rodrigues; C. Salzmann; M. Schiller; O. Schneider; E. Simioni; O. Steinkamp; J. Van Tilburg; N. Tuning; U. Uwer; S. Vecchi; S. Viret

doi:10.1016/j.nima.2012.11.192

Application of vertex and mass constraints in track-based alignment

J. Amoraal, J. Blouw, S. Blusk, S. Borghi, M. Cattaneo, N. Chiapolini, G. Conti, M. Deissenroth, F. Dupertuis, R. Van Der Eijk, V. Fave, M. Gersabeck, A. Hicheur, W. Hulsbergen, D. Hutchcroft, A. Kozlinskiy, R. W. Lambert, F. MacIuc, R. Märki, M. MartinelliM. Merk, M. Needham, L. Nicolas, J. Palacios, C. Parkes, A. Pellegrino, S. Pozzi, G. Raven, E. Rodrigues, C. Salzmann, M. Schiller, O. Schneider, E. Simioni, O. Steinkamp, J. Van Tilburg, N. Tuning, U. Uwer, S. Vecchi, S. Viret

Department of Physics

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

The software alignment of planar tracking detectors using samples of charged particle trajectories may lead to global detector distortions that affect vertex and momentum resolution. We present an alignment procedure that constrains such distortions by making use of samples of decay vertices reconstructed from two or more trajectories and putting constraints on their invariant mass. We illustrate the method by using a sample of invariant-mass constrained vertices from ^D0→^K-π+ decays to remove a curvature bias in the LHCb spectrometer.

Original language	English (US)
Pages (from-to)	48-55
Number of pages	8
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	712
DOIs	https://doi.org/10.1016/j.nima.2012.11.192
State	Published - 2013

Keywords

Curvature bias
Detector alignment
Vertex fit

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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Amoraal, J., Blouw, J., Blusk, S., Borghi, S., Cattaneo, M., Chiapolini, N., Conti, G., Deissenroth, M., Dupertuis, F., Van Der Eijk, R., Fave, V., Gersabeck, M., Hicheur, A., Hulsbergen, W., Hutchcroft, D., Kozlinskiy, A., Lambert, R. W., MacIuc, F., Märki, R., ... Viret, S. (2013). Application of vertex and mass constraints in track-based alignment. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 712, 48-55. https://doi.org/10.1016/j.nima.2012.11.192

Application of vertex and mass constraints in track-based alignment. / Amoraal, J.; Blouw, J.; Blusk, S.; Borghi, S.; Cattaneo, M.; Chiapolini, N.; Conti, G.; Deissenroth, M.; Dupertuis, F.; Van Der Eijk, R.; Fave, V.; Gersabeck, M.; Hicheur, A.; Hulsbergen, W.; Hutchcroft, D.; Kozlinskiy, A.; Lambert, R. W.; MacIuc, F.; Märki, R.; Martinelli, M.; Merk, M.; Needham, M.; Nicolas, L.; Palacios, J.; Parkes, C.; Pellegrino, A.; Pozzi, S.; Raven, G.; Rodrigues, E.; Salzmann, C.; Schiller, M.; Schneider, O.; Simioni, E.; Steinkamp, O.; Van Tilburg, J.; Tuning, N.; Uwer, U.; Vecchi, S.; Viret, S.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 712, 2013, p. 48-55.

Research output: Contribution to journal › Article › peer-review

Amoraal, J, Blouw, J, Blusk, S, Borghi, S, Cattaneo, M, Chiapolini, N, Conti, G, Deissenroth, M, Dupertuis, F, Van Der Eijk, R, Fave, V, Gersabeck, M, Hicheur, A, Hulsbergen, W, Hutchcroft, D, Kozlinskiy, A, Lambert, RW, MacIuc, F, Märki, R, Martinelli, M, Merk, M, Needham, M, Nicolas, L, Palacios, J, Parkes, C, Pellegrino, A, Pozzi, S, Raven, G, Rodrigues, E, Salzmann, C, Schiller, M, Schneider, O, Simioni, E, Steinkamp, O, Van Tilburg, J, Tuning, N, Uwer, U, Vecchi, S & Viret, S 2013, 'Application of vertex and mass constraints in track-based alignment', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 712, pp. 48-55. https://doi.org/10.1016/j.nima.2012.11.192

Amoraal, J. ; Blouw, J. ; Blusk, S. ; Borghi, S. ; Cattaneo, M. ; Chiapolini, N. ; Conti, G. ; Deissenroth, M. ; Dupertuis, F. ; Van Der Eijk, R. ; Fave, V. ; Gersabeck, M. ; Hicheur, A. ; Hulsbergen, W. ; Hutchcroft, D. ; Kozlinskiy, A. ; Lambert, R. W. ; MacIuc, F. ; Märki, R. ; Martinelli, M. ; Merk, M. ; Needham, M. ; Nicolas, L. ; Palacios, J. ; Parkes, C. ; Pellegrino, A. ; Pozzi, S. ; Raven, G. ; Rodrigues, E. ; Salzmann, C. ; Schiller, M. ; Schneider, O. ; Simioni, E. ; Steinkamp, O. ; Van Tilburg, J. ; Tuning, N. ; Uwer, U. ; Vecchi, S. ; Viret, S. / Application of vertex and mass constraints in track-based alignment. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2013 ; Vol. 712. pp. 48-55.

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abstract = "The software alignment of planar tracking detectors using samples of charged particle trajectories may lead to global detector distortions that affect vertex and momentum resolution. We present an alignment procedure that constrains such distortions by making use of samples of decay vertices reconstructed from two or more trajectories and putting constraints on their invariant mass. We illustrate the method by using a sample of invariant-mass constrained vertices from D0→K-π+ decays to remove a curvature bias in the LHCb spectrometer.",

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note = "Funding Information: The authors of this paper are members and ex-members of the LHCb collaboration. For the analysis presented in Section 4 we are indebted to the LHCb collaboration for the use of the LHCb software environment and LHCb data. Individual authors acknowledge support from various National Agencies, in particular CERN, CNRS/IN2P3 (France) , BMBF, DFG, HGF and MPG (Germany) , INFN (Italy) , FOM and NWO (The Netherlands) , SNSF and SER (Switzerland) , STFC (United Kingdom) and NSF (USA) . ",

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AU - Amoraal, J.

AU - Blouw, J.

AU - Blusk, S.

AU - Borghi, S.

AU - Cattaneo, M.

AU - Chiapolini, N.

AU - Conti, G.

AU - Deissenroth, M.

AU - Dupertuis, F.

AU - Van Der Eijk, R.

AU - Fave, V.

AU - Gersabeck, M.

AU - Hicheur, A.

AU - Hulsbergen, W.

AU - Hutchcroft, D.

AU - Kozlinskiy, A.

AU - Lambert, R. W.

AU - MacIuc, F.

AU - Märki, R.

AU - Martinelli, M.

AU - Merk, M.

AU - Needham, M.

AU - Nicolas, L.

AU - Palacios, J.

AU - Parkes, C.

AU - Pellegrino, A.

AU - Pozzi, S.

AU - Raven, G.

AU - Rodrigues, E.

AU - Salzmann, C.

AU - Schiller, M.

AU - Schneider, O.

AU - Simioni, E.

AU - Steinkamp, O.

AU - Van Tilburg, J.

AU - Tuning, N.

AU - Uwer, U.

AU - Vecchi, S.

AU - Viret, S.

N1 - Funding Information: The authors of this paper are members and ex-members of the LHCb collaboration. For the analysis presented in Section 4 we are indebted to the LHCb collaboration for the use of the LHCb software environment and LHCb data. Individual authors acknowledge support from various National Agencies, in particular CERN, CNRS/IN2P3 (France) , BMBF, DFG, HGF and MPG (Germany) , INFN (Italy) , FOM and NWO (The Netherlands) , SNSF and SER (Switzerland) , STFC (United Kingdom) and NSF (USA) .

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N2 - The software alignment of planar tracking detectors using samples of charged particle trajectories may lead to global detector distortions that affect vertex and momentum resolution. We present an alignment procedure that constrains such distortions by making use of samples of decay vertices reconstructed from two or more trajectories and putting constraints on their invariant mass. We illustrate the method by using a sample of invariant-mass constrained vertices from D0→K-π+ decays to remove a curvature bias in the LHCb spectrometer.

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KW - Detector alignment

KW - Vertex fit

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