Search for anomalous production of highly boosted Z bosons decaying to μ+μ− in proton-proton collisions at [Formula presented] TeV

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

doi:10.1016/j.physletb.2013.03.037

Search for anomalous production of highly boosted Z bosons decaying to μ⁺μ⁻ in proton-proton collisions at [Formula presented] TeV

S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, E. Aguilo, T. Bergauer, M. Dragicevic, J. Erö, C. Fabjan, M. Friedl, R. Frühwirth, V. M. Ghete, J. Hammer, N. Hörmann, J. Hrubec, M. Jeitler, W. Kiesenhofer, V. Knünz, M. KrammerI. Krätschmer, D. Liko, I. Mikulec, M. Pernicka, B. Rahbaran, C. Rohringer, H. Rohringer, R. Schöfbeck, J. Strauss, A. Taurok, W. Waltenberger, G. Walzel, E. Widl, C. E. Wulz, V. Mossolov, N. Shumeiko, J. Suarez Gonzalez, S. Bansal, T. Cornelis, E. A. De Wolf, X. Janssen, S. Luyckx, L. Mucibello, S. Ochesanu, B. Roland, R. Rougny, S. Nourbakhsh, Y. Kubota, J. Mans, R. Rusack, CMS Collaboration

Physics and Astronomy (Twin Cities)

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

8 Scopus citations

Abstract

Results are reported from a search for the anomalous production of highly boosted Z bosons with large transverse momentum and decaying to μ⁺μ⁻. Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at s=7 TeV, corresponding to an integrated luminosity of 5.0 fb⁻¹ recorded with the CMS detector. The shape of the observed transverse momentum distribution of Z bosons is consistent with standard model expectations. Constraints are obtained on models predicting the production of excited quarks decaying via electroweak processes. Assuming a compositeness scale that is equal to the excited quark mass as well as transition coupling strengths between Z bosons and excited quarks that are equal to standard model couplings to quarks, masses of excited quarks below 1.94 TeVare excluded at the 95% confidence level. For excited quark production via a novel contact interaction, masses below 2.22 TeVare excluded, even if the excited quarks do not couple to gluons.

Original language	English (US)
Pages (from-to)	28-47
Number of pages	20
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	722
Issue number	1-3
DOIs	https://doi.org/10.1016/j.physletb.2013.03.037
State	Published - May 13 2013

Bibliographical note

Publisher Copyright:
© 2013 CERN

Keywords

CMS
Dimuons
Excited quarks
New phenomena
Physics

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10.1016/j.physletb.2013.03.037

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Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., Bergauer, T., Dragicevic, M., Erö, J., Fabjan, C., Friedl, M., Frühwirth, R., Ghete, V. M., Hammer, J., Hörmann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., Knünz, V., ... CMS Collaboration (2013). Search for anomalous production of highly boosted Z bosons decaying to μ⁺μ⁻ in proton-proton collisions at [Formula presented] TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 722(1-3), 28-47. https://doi.org/10.1016/j.physletb.2013.03.037

Search for anomalous production of highly boosted Z bosons decaying to μ⁺μ⁻ in proton-proton collisions at [Formula presented] TeV. / Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M. et al.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 722, No. 1-3, 13.05.2013, p. 28-47.

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

Chatrchyan, S, Khachatryan, V, Sirunyan, AM, Tumasyan, A, Adam, W, Aguilo, E, Bergauer, T, Dragicevic, M, Erö, J, Fabjan, C, Friedl, M, Frühwirth, R, Ghete, VM, Hammer, J, Hörmann, N, Hrubec, J, Jeitler, M, Kiesenhofer, W, Knünz, V, Krammer, M, Krätschmer, I, Liko, D, Mikulec, I, Pernicka, M, Rahbaran, B, Rohringer, C, Rohringer, H, Schöfbeck, R, Strauss, J, Taurok, A, Waltenberger, W, Walzel, G, Widl, E, Wulz, CE, Mossolov, V, Shumeiko, N, Suarez Gonzalez, J, Bansal, S, Cornelis, T, De Wolf, EA, Janssen, X, Luyckx, S, Mucibello, L, Ochesanu, S, Roland, B, Rougny, R, Nourbakhsh, S, Kubota, Y, Mans, J , Rusack, R & CMS Collaboration 2013, 'Search for anomalous production of highly boosted Z bosons decaying to μ⁺μ⁻ in proton-proton collisions at [Formula presented] TeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 722, no. 1-3, pp. 28-47. https://doi.org/10.1016/j.physletb.2013.03.037

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abstract = "Results are reported from a search for the anomalous production of highly boosted Z bosons with large transverse momentum and decaying to μ+μ−. Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at s=7 TeV, corresponding to an integrated luminosity of 5.0 fb−1 recorded with the CMS detector. The shape of the observed transverse momentum distribution of Z bosons is consistent with standard model expectations. Constraints are obtained on models predicting the production of excited quarks decaying via electroweak processes. Assuming a compositeness scale that is equal to the excited quark mass as well as transition coupling strengths between Z bosons and excited quarks that are equal to standard model couplings to quarks, masses of excited quarks below 1.94 TeVare excluded at the 95% confidence level. For excited quark production via a novel contact interaction, masses below 2.22 TeVare excluded, even if the excited quarks do not couple to gluons.",

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AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Aguilo, E.

AU - Bergauer, T.

AU - Dragicevic, M.

AU - Erö, J.

AU - Fabjan, C.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hammer, J.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Kiesenhofer, W.

AU - Knünz, V.

AU - Krammer, M.

AU - Krätschmer, I.

AU - Liko, D.

AU - Mikulec, I.

AU - Pernicka, M.

AU - Rahbaran, B.

AU - Rohringer, C.

AU - Rohringer, H.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Taurok, A.

AU - Waltenberger, W.

AU - Walzel, G.

AU - Widl, E.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Suarez Gonzalez, J.

AU - Bansal, S.

AU - Cornelis, T.

AU - De Wolf, E. A.

AU - Janssen, X.

AU - Luyckx, S.

AU - Mucibello, L.

AU - Ochesanu, S.

AU - Roland, B.

AU - Rougny, R.

AU - Nourbakhsh, S.

AU - Kubota, Y.

AU - Mans, J.

AU - Rusack, R.

AU - CMS Collaboration

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