Measurement of the jet mass in highly boosted tt events from pp collisions at s√=8 TeV

CMS Collaboration; Shimaa Abu Zeid; Freya Blekman; Jorgen D'Hondt; Nadir Daci; Isabelle Helena De Bruyn; Kevin Deroover; Steven Lowette; Seth Moortgat; Lieselotte Moreels; Annik Olbrechts; Quentin Python; Kirill Skovpen; Stefaan Tavernier; Walter Van Doninck; Petra Van Mulders; Isis Marina Van Parijs

doi:10.1140/epjc/s10052-017-5030-3

Measurement of the jet mass in highly boosted tt events from pp collisions at s√=8 TeV

CMS Collaboration, Shimaa Abu Zeid, Freya Blekman, Jorgen D'Hondt, Nadir Daci, Isabelle Helena De Bruyn, Kevin Deroover, Steven Lowette, Seth Moortgat, Lieselotte Moreels, Annik Olbrechts, Quentin Python, Kirill Skovpen, Stefaan Tavernier, Walter Van Doninck, Petra Van Mulders, Isis Marina Van Parijs

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

30 Citations (Scopus)

Abstract

The first measurement of the jet mass mjet of top quark jets produced in tt⎯⎯ events from pp collisions at s√=8TeV is reported for the jet with the largest transverse momentum pT in highly boosted hadronic top quark decays. The data sample, collected with the CMS detector, corresponds to an integrated luminosity of 19.7fb−1. The measurement is performed in the lepton+jets channel in which the products of the semileptonic decay t→bW with W→ℓν where ℓ is an electron or muon, are used to select tt⎯⎯ events with large Lorentz boosts. The products of the fully hadronic decay t→bW with W→qq⎯⎯⎯′ are reconstructed using a single Cambridge–Aachen jet with distance parameter R=1.2, and pT>400GeV. The tt⎯⎯ cross section as a function of mjet is unfolded at the particle level and is used to test the modelling of highly boosted top quark production. The peak position of the mjet distribution is sensitive to the top quark mass mt, and the data are used to extract a value of mt to assess this sensitivity.

Original language	English
Article number	467
Pages (from-to)	467
Number of pages	28
Journal	The European Physical Journal C
Volume	77
Issue number	7
DOIs	https://doi.org/10.1140/epjc/s10052-017-5030-3
Publication status	Published - 14 Jul 2017

Keywords

hep-ex

Access to Document

10.1140/epjc/s10052-017-5030-3

SRP8: Strategic Research Programme: High-Energy Physics at the VUB
D'Hondt, J., Van Eijndhoven, N., Craps, B. & Buitink, S.
1/11/12 → 31/10/24
Project: Fundamental

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CMS Collaboration, Abu Zeid, S., Blekman, F., D'Hondt, J., Daci, N., De Bruyn, I. H., Deroover, K., Lowette, S., Moortgat, S., Moreels, L., Olbrechts, A., Python, Q., Skovpen, K., Tavernier, S., Van Doninck, W., Van Mulders, P., & Van Parijs, I. M. (2017). Measurement of the jet mass in highly boosted tt events from pp collisions at s√=8 TeV. The European Physical Journal C, 77(7), 467. [467]. https://doi.org/10.1140/epjc/s10052-017-5030-3

CMS Collaboration ; Abu Zeid, Shimaa ; Blekman, Freya ; D'Hondt, Jorgen ; Daci, Nadir ; De Bruyn, Isabelle Helena ; Deroover, Kevin ; Lowette, Steven ; Moortgat, Seth ; Moreels, Lieselotte ; Olbrechts, Annik ; Python, Quentin ; Skovpen, Kirill ; Tavernier, Stefaan ; Van Doninck, Walter ; Van Mulders, Petra ; Van Parijs, Isis Marina. / Measurement of the jet mass in highly boosted tt events from pp collisions at s√=8 TeV. In: The European Physical Journal C. 2017 ; Vol. 77, No. 7. pp. 467.

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abstract = "The first measurement of the jet mass mjet of top quark jets produced in tt⎯⎯ events from pp collisions at s√=8TeV is reported for the jet with the largest transverse momentum pT in highly boosted hadronic top quark decays. The data sample, collected with the CMS detector, corresponds to an integrated luminosity of 19.7fb−1. The measurement is performed in the lepton+jets channel in which the products of the semileptonic decay t→bW with W→ℓν where ℓ is an electron or muon, are used to select tt⎯⎯ events with large Lorentz boosts. The products of the fully hadronic decay t→bW with W→qq⎯⎯⎯′ are reconstructed using a single Cambridge–Aachen jet with distance parameter R=1.2, and pT>400GeV. The tt⎯⎯ cross section as a function of mjet is unfolded at the particle level and is used to test the modelling of highly boosted top quark production. The peak position of the mjet distribution is sensitive to the top quark mass mt, and the data are used to extract a value of mt to assess this sensitivity.",

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author = "{CMS Collaboration} and {Abu Zeid}, Shimaa and Freya Blekman and Jorgen D'Hondt and Nadir Daci and {De Bruyn}, {Isabelle Helena} and Kevin Deroover and Steven Lowette and Seth Moortgat and Lieselotte Moreels and Annik Olbrechts and Quentin Python and Kirill Skovpen and Stefaan Tavernier and {Van Doninck}, Walter and {Van Mulders}, Petra and {Van Parijs}, {Isis Marina}",

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CMS Collaboration, Abu Zeid, S, Blekman, F , D'Hondt, J, Daci, N, De Bruyn, IH, Deroover, K, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P & Van Parijs, IM 2017, 'Measurement of the jet mass in highly boosted tt events from pp collisions at s√=8 TeV', The European Physical Journal C, vol. 77, no. 7, 467, pp. 467. https://doi.org/10.1140/epjc/s10052-017-5030-3

Measurement of the jet mass in highly boosted tt events from pp collisions at s√=8 TeV. / CMS Collaboration; Abu Zeid, Shimaa; Blekman, Freya ; D'Hondt, Jorgen; Daci, Nadir; De Bruyn, Isabelle Helena; Deroover, Kevin; Lowette, Steven; Moortgat, Seth; Moreels, Lieselotte; Olbrechts, Annik; Python, Quentin; Skovpen, Kirill; Tavernier, Stefaan; Van Doninck, Walter; Van Mulders, Petra; Van Parijs, Isis Marina.

In: The European Physical Journal C, Vol. 77, No. 7, 467, 14.07.2017, p. 467.

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

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AU - Abu Zeid, Shimaa

AU - Blekman, Freya

AU - D'Hondt, Jorgen

AU - Daci, Nadir

AU - De Bruyn, Isabelle Helena

AU - Deroover, Kevin

AU - Lowette, Steven

AU - Moortgat, Seth

AU - Moreels, Lieselotte

AU - Olbrechts, Annik

AU - Python, Quentin

AU - Skovpen, Kirill

AU - Tavernier, Stefaan

AU - Van Doninck, Walter

AU - Van Mulders, Petra

AU - Van Parijs, Isis Marina

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AB - The first measurement of the jet mass mjet of top quark jets produced in tt⎯⎯ events from pp collisions at s√=8TeV is reported for the jet with the largest transverse momentum pT in highly boosted hadronic top quark decays. The data sample, collected with the CMS detector, corresponds to an integrated luminosity of 19.7fb−1. The measurement is performed in the lepton+jets channel in which the products of the semileptonic decay t→bW with W→ℓν where ℓ is an electron or muon, are used to select tt⎯⎯ events with large Lorentz boosts. The products of the fully hadronic decay t→bW with W→qq⎯⎯⎯′ are reconstructed using a single Cambridge–Aachen jet with distance parameter R=1.2, and pT>400GeV. The tt⎯⎯ cross section as a function of mjet is unfolded at the particle level and is used to test the modelling of highly boosted top quark production. The peak position of the mjet distribution is sensitive to the top quark mass mt, and the data are used to extract a value of mt to assess this sensitivity.

KW - hep-ex

U2 - 10.1140/epjc/s10052-017-5030-3

DO - 10.1140/epjc/s10052-017-5030-3

M3 - Article

VL - 77

SP - 467

JO - European Physical Journal C - Particles & Fields

JF - European Physical Journal C - Particles & Fields

SN - 1434-6044

IS - 7

M1 - 467

ER -

Measurement of the jet mass in highly boosted tt events from pp collisions at s√=8 TeV

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SRP8: Strategic Research Programme: High-Energy Physics at the VUB

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