Determination of the top-quark pole mass and strong coupling constant from the tt¯ production cross section in pp collisions at s=7 TeV

S. Chatrchyan; V. Khachatryan; A. M. Sirunyan; A. Tumasyan; W. Adam; T. Bergauer; M. Dragicevic; J. Erö; C. Fabjan; M. Friedl; R. Frühwirth; V. M. Ghete; N. Hörmann; J. Hrubec; M. Jeitler; W. Kiesenhofer; V. Knünz; M. Krammer; I. Krätschmer; D. Liko; I. Mikulec; D. Rabady; B. Rahbaran; C. Rohringer; H. Rohringer; R. Schöfbeck; J. Strauss; A. Taurok; W. Treberer-Treberspurg; W. Waltenberger; C. E. Wulz; V. Mossolov; N. Shumeiko; J. Suarez Gonzalez; S. Alderweireldt; M. Bansal; S. Bansal; T. Cornelis; E. A. De Wolf; X. Janssen; A. Knutsson; S. Luyckx; L. Mucibello; S. Ochesanu; B. Roland; R. M. Chatterjee; S. Nourbakhsh; Y. Kubota; J. Mans; R. Rusack; CMS Collaboration

doi:10.1016/j.physletb.2013.12.009

Determination of the top-quark pole mass and strong coupling constant from the tt¯ production cross section in pp collisions at s=7 TeV

S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Erö, C. Fabjan, M. Friedl, R. Frühwirth, V. M. Ghete, N. Hörmann, J. Hrubec, M. Jeitler, W. Kiesenhofer, V. Knünz, M. Krammer, I. Krätschmer, D. LikoI. Mikulec, D. Rabady, B. Rahbaran, C. Rohringer, H. Rohringer, R. Schöfbeck, J. Strauss, A. Taurok, W. Treberer-Treberspurg, W. Waltenberger, C. E. Wulz, V. Mossolov, N. Shumeiko, J. Suarez Gonzalez, S. Alderweireldt, M. Bansal, S. Bansal, T. Cornelis, E. A. De Wolf, X. Janssen, A. Knutsson, S. Luyckx, L. Mucibello, S. Ochesanu, B. Roland, R. M. Chatterjee, S. Nourbakhsh, Y. Kubota, J. Mans, R. Rusack, CMS Collaboration

Physics and Astronomy (Twin Cities)

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124 Scopus citations

Abstract

The inclusive cross section for top-quark pair production measured by the CMS experiment in proton–proton collisions at a center-of-mass energy of 7 TeV is compared to the QCD prediction at next-to-next-to-leading order with various parton distribution functions to determine the top-quark pole mass, m_t ^pole, or the strong coupling constant, α_S. With the parton distribution function set NNPDF2.3, a pole mass of 176.7_−3.4 ^+3.8 GeV is obtained when constraining α_S at the scale of the Z boson mass, m_Z, to the current world average. Alternatively, by constraining m_t ^pole to the latest average from direct mass measurements, a value of α_S(m_Z)=0.1151_−0.0032 ^+0.0033 is extracted. This is the first determination of α_S using events from top-quark production.

Original language	English (US)
Pages (from-to)	496-517
Number of pages	22
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	728
DOIs	https://doi.org/10.1016/j.physletb.2013.12.009
State	Published - Jan 20 2014

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Publisher Copyright:
© 2013 The Authors

Keywords

CMS
Constant
Coupling
Cross section
Mass
Pair
Physics
QCD
Quark
Strong
Top

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Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Erö, J., Fabjan, C., Friedl, M., Frühwirth, R., Ghete, V. M., Hörmann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., Knünz, V., Krammer, M., Krätschmer, I., ... CMS Collaboration (2014). Determination of the top-quark pole mass and strong coupling constant from the tt¯ production cross section in pp collisions at s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 728, 496-517. https://doi.org/10.1016/j.physletb.2013.12.009

Determination of the top-quark pole mass and strong coupling constant from the tt¯ production cross section in pp collisions at s=7 TeV. / Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M. et al.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 728, 20.01.2014, p. 496-517.

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

Chatrchyan, S, Khachatryan, V, Sirunyan, AM, Tumasyan, A, Adam, W, Bergauer, T, Dragicevic, M, Erö, J, Fabjan, C, Friedl, M, Frühwirth, R, Ghete, VM, Hörmann, N, Hrubec, J, Jeitler, M, Kiesenhofer, W, Knünz, V, Krammer, M, Krätschmer, I, Liko, D, Mikulec, I, Rabady, D, Rahbaran, B, Rohringer, C, Rohringer, H, Schöfbeck, R, Strauss, J, Taurok, A, Treberer-Treberspurg, W, Waltenberger, W, Wulz, CE, Mossolov, V, Shumeiko, N, Suarez Gonzalez, J, Alderweireldt, S, Bansal, M, Bansal, S, Cornelis, T, De Wolf, EA, Janssen, X, Knutsson, A, Luyckx, S, Mucibello, L, Ochesanu, S, Roland, B, Chatterjee, RM, Nourbakhsh, S, Kubota, Y, Mans, J , Rusack, R & CMS Collaboration 2014, 'Determination of the top-quark pole mass and strong coupling constant from the tt¯ production cross section in pp collisions at s=7 TeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 728, pp. 496-517. https://doi.org/10.1016/j.physletb.2013.12.009

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abstract = "The inclusive cross section for top-quark pair production measured by the CMS experiment in proton–proton collisions at a center-of-mass energy of 7 TeV is compared to the QCD prediction at next-to-next-to-leading order with various parton distribution functions to determine the top-quark pole mass, mt pole, or the strong coupling constant, αS. With the parton distribution function set NNPDF2.3, a pole mass of 176.7−3.4 +3.8 GeV is obtained when constraining αS at the scale of the Z boson mass, mZ, to the current world average. Alternatively, by constraining mt pole to the latest average from direct mass measurements, a value of αS(mZ)=0.1151−0.0032 +0.0033 is extracted. This is the first determination of αS using events from top-quark production.",

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AU - Tumasyan, A.

AU - Adam, W.

AU - Bergauer, T.

AU - Dragicevic, M.

AU - Erö, J.

AU - Fabjan, C.

AU - Friedl, M.

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AU - Mikulec, I.

AU - Rabady, D.

AU - Rahbaran, B.

AU - Rohringer, C.

AU - Rohringer, H.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Taurok, A.

AU - Treberer-Treberspurg, W.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Suarez Gonzalez, J.

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AU - Bansal, S.

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AU - Janssen, X.

AU - Knutsson, A.

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AU - Mucibello, L.

AU - Ochesanu, S.

AU - Roland, B.

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KW - Coupling

KW - Cross section

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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ER -

Determination of the top-quark pole mass and strong coupling constant from the tt¯ production cross section in pp collisions at s=7 TeV

Abstract

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Keywords

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