Inclusive and differential measurements of the tt charge asymmetry in pp collisions at √s=8 TeV

V. Khachatryan; 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; V. Knünz; A. König; M. Krammer; I. Krätschmer; D. Liko; T. Matsushita; I. Mikulec; D. Rabady; B. Rahbaran; H. Rohringer; J. Schieck; R. Schöfbeck; J. Strauss; W. Treberer-Treberspurg; W. Waltenberger; C. E. Wulz; V. Mossolov; N. Shumeiko; J. Suarez Gonzalez; S. Alderweireldt; T. Cornelis; E. A. De Wolf; X. Janssen; A. Knutsson; J. Lauwers; S. Luyckx; R. M. Chatterjee; Y. Kubota; J. Mans; S. Nourbakhsh; N. Ruckstuhl; R. Rusack; CMS Collaboration

doi:10.1016/j.physletb.2016.03.060

Inclusive and differential measurements of the tt charge asymmetry in pp collisions at √s=8 TeV

V. Khachatryan, 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, V. Knünz, A. KönigM. Krammer, I. Krätschmer, D. Liko, T. Matsushita, I. Mikulec, D. Rabady, B. Rahbaran, H. Rohringer, J. Schieck, R. Schöfbeck, J. Strauss, W. Treberer-Treberspurg, W. Waltenberger, C. E. Wulz, V. Mossolov, N. Shumeiko, J. Suarez Gonzalez, S. Alderweireldt, T. Cornelis, E. A. De Wolf, X. Janssen, A. Knutsson, J. Lauwers, S. Luyckx, R. M. Chatterjee, Y. Kubota, J. Mans, S. Nourbakhsh, N. Ruckstuhl, R. Rusack, CMS Collaboration

Physics and Astronomy (Twin Cities)

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

32 Scopus citations

Abstract

The tt- charge asymmetry is measured in proton-proton collisions at a centre-of-mass energy of 8 TeV. The data, collected with the CMS experiment at the LHC, correspond to an integrated luminosity of 19.7 fb^-1. Selected events contain an electron or a muon and four or more jets, where at least one jet is identified as originating from b-quark hadronization. The inclusive charge asymmetry is found to be 0.0010±0.0068 (stat)±0.0037 (syst). In addition, differential charge asymmetries as a function of rapidity, transverse momentum, and invariant mass of the tt- system are studied. For the first time at the LHC, the measurements are also performed in a reduced fiducial phase space of top quark pair production, with an integrated result of -0.0035±0.0072 (stat)±0.0031 (syst). All measurements are consistent within two standard deviations with zero asymmetry as well as with the predictions of the standard model.

Original language	English (US)
Pages (from-to)	154-179
Number of pages	26
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	757
DOIs	https://doi.org/10.1016/j.physletb.2016.03.060
State	Published - Jun 10 2016

Keywords

Charge asymmetry
CMS
Physics
Top quark

Publisher link

10.1016/j.physletb.2016.03.060

Find It

Find It at U of M Libraries

Cite this

Khachatryan, V., 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., Knünz, V., ... CMS Collaboration (2016). Inclusive and differential measurements of the tt charge asymmetry in pp collisions at √s=8 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 757, 154-179. https://doi.org/10.1016/j.physletb.2016.03.060

Khachatryan, V, 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, Knünz, V, König, A, Krammer, M, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rahbaran, B, Rohringer, H, Schieck, J, Schöfbeck, R, Strauss, J, Treberer-Treberspurg, W, Waltenberger, W, Wulz, CE, Mossolov, V, Shumeiko, N, Suarez Gonzalez, J, Alderweireldt, S, Cornelis, T, De Wolf, EA, Janssen, X, Knutsson, A, Lauwers, J, Luyckx, S, Chatterjee, RM, Kubota, Y, Mans, J, Nourbakhsh, S, Ruckstuhl, N, Rusack, R & CMS Collaboration 2016, 'Inclusive and differential measurements of the tt charge asymmetry in pp collisions at √s=8 TeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 757, pp. 154-179. https://doi.org/10.1016/j.physletb.2016.03.060

@article{2a96dc798dd94ea3837f3eebc493b1bd,

title = "Inclusive and differential measurements of the tt charge asymmetry in pp collisions at √s=8 TeV",

abstract = "The tt- charge asymmetry is measured in proton-proton collisions at a centre-of-mass energy of 8 TeV. The data, collected with the CMS experiment at the LHC, correspond to an integrated luminosity of 19.7 fb-1. Selected events contain an electron or a muon and four or more jets, where at least one jet is identified as originating from b-quark hadronization. The inclusive charge asymmetry is found to be 0.0010±0.0068 (stat)±0.0037 (syst). In addition, differential charge asymmetries as a function of rapidity, transverse momentum, and invariant mass of the tt- system are studied. For the first time at the LHC, the measurements are also performed in a reduced fiducial phase space of top quark pair production, with an integrated result of -0.0035±0.0072 (stat)±0.0031 (syst). All measurements are consistent within two standard deviations with zero asymmetry as well as with the predictions of the standard model.",

keywords = "Charge asymmetry, CMS, Physics, Top quark",

author = "V. Khachatryan and 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 V. Kn{\"u}nz and A. K{\"o}nig and M. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Matsushita and I. Mikulec and D. Rabady and B. Rahbaran and H. Rohringer and J. Schieck and R. Sch{\"o}fbeck and J. Strauss and W. Treberer-Treberspurg and W. Waltenberger and Wulz, {C. E.} and V. Mossolov and N. Shumeiko and {Suarez Gonzalez}, J. and S. Alderweireldt and T. Cornelis and {De Wolf}, {E. A.} and X. Janssen and A. Knutsson and J. Lauwers and S. Luyckx and Chatterjee, {R. M.} and Y. Kubota and J. Mans and S. Nourbakhsh and N. Ruckstuhl and R. Rusack and {CMS Collaboration}",

year = "2016",

month = jun,

day = "10",

doi = "10.1016/j.physletb.2016.03.060",

language = "English (US)",

volume = "757",

pages = "154--179",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

}

TY - JOUR

T1 - Inclusive and differential measurements of the tt charge asymmetry in pp collisions at √s=8 TeV

AU - Khachatryan, V.

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 - Knünz, V.

AU - König, A.

AU - Krammer, M.

AU - Krätschmer, I.

AU - Liko, D.

AU - Matsushita, T.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Treberer-Treberspurg, W.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Suarez Gonzalez, J.

AU - Alderweireldt, S.

AU - Cornelis, T.

AU - De Wolf, E. A.

AU - Janssen, X.

AU - Knutsson, A.

AU - Lauwers, J.

AU - Luyckx, S.

AU - Chatterjee, R. M.

AU - Kubota, Y.

AU - Mans, J.

AU - Nourbakhsh, S.

AU - Ruckstuhl, N.

AU - Rusack, R.

AU - CMS Collaboration

PY - 2016/6/10

Y1 - 2016/6/10

N2 - The tt- charge asymmetry is measured in proton-proton collisions at a centre-of-mass energy of 8 TeV. The data, collected with the CMS experiment at the LHC, correspond to an integrated luminosity of 19.7 fb-1. Selected events contain an electron or a muon and four or more jets, where at least one jet is identified as originating from b-quark hadronization. The inclusive charge asymmetry is found to be 0.0010±0.0068 (stat)±0.0037 (syst). In addition, differential charge asymmetries as a function of rapidity, transverse momentum, and invariant mass of the tt- system are studied. For the first time at the LHC, the measurements are also performed in a reduced fiducial phase space of top quark pair production, with an integrated result of -0.0035±0.0072 (stat)±0.0031 (syst). All measurements are consistent within two standard deviations with zero asymmetry as well as with the predictions of the standard model.

AB - The tt- charge asymmetry is measured in proton-proton collisions at a centre-of-mass energy of 8 TeV. The data, collected with the CMS experiment at the LHC, correspond to an integrated luminosity of 19.7 fb-1. Selected events contain an electron or a muon and four or more jets, where at least one jet is identified as originating from b-quark hadronization. The inclusive charge asymmetry is found to be 0.0010±0.0068 (stat)±0.0037 (syst). In addition, differential charge asymmetries as a function of rapidity, transverse momentum, and invariant mass of the tt- system are studied. For the first time at the LHC, the measurements are also performed in a reduced fiducial phase space of top quark pair production, with an integrated result of -0.0035±0.0072 (stat)±0.0031 (syst). All measurements are consistent within two standard deviations with zero asymmetry as well as with the predictions of the standard model.

KW - Charge asymmetry

KW - CMS

KW - Physics

KW - Top quark

UR - http://www.scopus.com/inward/record.url?scp=84962710685&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84962710685&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2016.03.060

DO - 10.1016/j.physletb.2016.03.060

M3 - Article

SN - 0370-2693

VL - 757

SP - 154

EP - 179

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

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

ER -

Inclusive and differential measurements of the tt charge asymmetry in pp collisions at √s=8 TeV

Abstract

Keywords

Publisher link

Find It

Other files and links

Fingerprint

Cite this