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

A. M. Sirunyan; A. Tumasyan; W. Adam; E. Asilar; T. Bergauer; J. Brandstetter; E. Brondolin; M. Dragicevic; J. Erö; M. Flechl; M. Friedl; R. Frühwirth; V. M. Ghete; C. Hartl; N. Hörmann; J. Hrubec; M. Jeitler; A. König; I. Krätschmer; D. Liko; T. Matsushita; I. Mikulec; D. Rabady; N. Rad; B. Rahbaran; H. Rohringer; J. Schieck; J. Strauss; W. Waltenberger; C. E. Wulz; O. Dvornikov; V. Makarenko; V. Mossolov; J. Suarez Gonzalez; V. Zykunov; N. Shumeiko; S. Alderweireldt; E. A. De Wolf; X. Janssen; J. Lauwers; M. Van De Klundert; H. Van Haevermaet; P. Van Mechelen; N. Van Remortel; A. Van Spilbeeck; R. M. Chatterjee; Y. Kubota; J. Mans; S. Nourbakhsh; R. Rusack; CMS Collaboration

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

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

A. M. Sirunyan, A. Tumasyan, W. Adam, E. Asilar, T. Bergauer, J. Brandstetter, E. Brondolin, M. Dragicevic, J. Erö, M. Flechl, M. Friedl, R. Frühwirth, V. M. Ghete, C. Hartl, N. Hörmann, J. Hrubec, M. Jeitler, A. König, I. Krätschmer, D. LikoT. Matsushita, I. Mikulec, D. Rabady, N. Rad, B. Rahbaran, H. Rohringer, J. Schieck, J. Strauss, W. Waltenberger, C. E. Wulz, O. Dvornikov, V. Makarenko, V. Mossolov, J. Suarez Gonzalez, V. Zykunov, N. Shumeiko, S. Alderweireldt, E. A. De Wolf, X. Janssen, J. Lauwers, M. Van De Klundert, H. Van Haevermaet, P. Van Mechelen, N. Van Remortel, A. Van Spilbeeck, R. M. Chatterjee, Y. Kubota, J. Mans, S. Nourbakhsh, R. Rusack, CMS Collaboration

Physics and Astronomy (Twin Cities)

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Abstract

The first measurement of the jet mass m_jet of top quark jets produced in t t ¯ events from pp collisions at s=8TeV is reported for the jet with the largest transverse momentum p_T 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 → b W with W → ℓν where ℓ is an electron or muon, are used to select t t ¯ events with large Lorentz boosts. The products of the fully hadronic decay t → b W with W → q q ¯ ^′ are reconstructed using a single Cambridge–Aachen jet with distance parameter R= 1.2 , and p_T> 400 GeV. The t t ¯ cross section as a function of m_jet is unfolded at the particle level and is used to test the modelling of highly boosted top quark production. The peak position of the m_jet distribution is sensitive to the top quark mass m_t, and the data are used to extract a value of m_t to assess this sensitivity.

Original language	English (US)
Article number	467
Journal	European Physical Journal C
Volume	77
Issue number	7
DOIs	https://doi.org/10.1140/epjc/s10052-017-5030-3
State	Published - Jul 1 2017

Bibliographical note

Publisher Copyright:
© 2017, CERN for the benefit of the CMS collaboration.

Keywords

CMS
Physics
Top quark cross section
Top quark mass

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Sirunyan, A. M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V. M., Hartl, C., Hörmann, N., Hrubec, J., Jeitler, M., König, A., Krätschmer, I., ... CMS Collaboration (2017). Measurement of the jet mass in highly boosted t t ¯ events from pp collisions at √s=8TeV. European Physical Journal C, 77(7), Article 467. https://doi.org/10.1140/epjc/s10052-017-5030-3

Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Waltenberger, W, Wulz, CE, Dvornikov, O, Makarenko, V, Mossolov, V, Suarez Gonzalez, J, Zykunov, V, Shumeiko, N, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Chatterjee, RM, Kubota, Y, Mans, J, Nourbakhsh, S, Rusack, R & CMS Collaboration 2017, 'Measurement of the jet mass in highly boosted t t ¯ events from pp collisions at √s=8TeV', European Physical Journal C, vol. 77, no. 7, 467. https://doi.org/10.1140/epjc/s10052-017-5030-3

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abstract = "The first measurement of the jet mass mjet of top quark jets produced in t t ¯ 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 → b W with W → ℓν where ℓ is an electron or muon, are used to select t t ¯ events with large Lorentz boosts. The products of the fully hadronic decay t → b W with W → q q ¯ ′ are reconstructed using a single Cambridge–Aachen jet with distance parameter R= 1.2 , and pT> 400 GeV. The t t ¯ 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 = "Sirunyan, {A. M.} and A. Tumasyan and W. Adam and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and M. Flechl and M. Friedl and R. Fr{\"u}hwirth and Ghete, {V. M.} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and A. K{\"o}nig and I. Kr{\"a}tschmer and D. Liko and T. Matsushita and I. Mikulec and D. Rabady and N. Rad and B. Rahbaran and H. Rohringer and J. Schieck and J. Strauss and W. Waltenberger and Wulz, {C. E.} and O. Dvornikov and V. Makarenko and V. Mossolov and {Suarez Gonzalez}, J. and V. Zykunov and N. Shumeiko and S. Alderweireldt and {De Wolf}, {E. A.} and X. Janssen and J. Lauwers and {Van De Klundert}, M. and {Van Haevermaet}, H. and {Van Mechelen}, P. and {Van Remortel}, N. and {Van Spilbeeck}, A. and Chatterjee, {R. M.} and Y. Kubota and J. Mans and S. Nourbakhsh and R. Rusack and {CMS Collaboration}",

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AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Flechl, M.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - König, A.

AU - Krätschmer, I.

AU - Liko, D.

AU - Matsushita, T.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rad, N.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schieck, J.

AU - Strauss, J.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Dvornikov, O.

AU - Makarenko, V.

AU - Mossolov, V.

AU - Suarez Gonzalez, J.

AU - Zykunov, V.

AU - Shumeiko, N.

AU - Alderweireldt, S.

AU - De Wolf, E. A.

AU - Janssen, X.

AU - Lauwers, J.

AU - Van De Klundert, M.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Remortel, N.

AU - Van Spilbeeck, A.

AU - Chatterjee, R. M.

AU - Kubota, Y.

AU - Mans, J.

AU - Nourbakhsh, S.

AU - Rusack, R.

AU - CMS Collaboration

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N2 - The first measurement of the jet mass mjet of top quark jets produced in t t ¯ 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 → b W with W → ℓν where ℓ is an electron or muon, are used to select t t ¯ events with large Lorentz boosts. The products of the fully hadronic decay t → b W with W → q q ¯ ′ are reconstructed using a single Cambridge–Aachen jet with distance parameter R= 1.2 , and pT> 400 GeV. The t t ¯ 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.

AB - The first measurement of the jet mass mjet of top quark jets produced in t t ¯ 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 → b W with W → ℓν where ℓ is an electron or muon, are used to select t t ¯ events with large Lorentz boosts. The products of the fully hadronic decay t → b W with W → q q ¯ ′ are reconstructed using a single Cambridge–Aachen jet with distance parameter R= 1.2 , and pT> 400 GeV. The t t ¯ 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 - CMS

KW - Physics

KW - Top quark cross section

KW - Top quark mass

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

M3 - Article

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AN - SCOPUS:85025124421

SN - 1434-6044

VL - 77

JO - European Physical Journal C

JF - European Physical Journal C

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ER -

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

Abstract

Bibliographical note

Keywords

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