Measurement of the $k_\mathrm{t}$ splitting scales in $Z \to \ell\ell$ events in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector

M. Aaboud N. Berger 1 A.M. Burger 1 M. Delmastro 1 L. Di Ciaccio 1 S. Elles 1 K. Grevtsov 1 T. Guillemin 1 T. Hryn’ova 1 S. Jézéquel 1 O. Kivernyk 1 I. Koletsou 1 R. Lafaye 1 Jérémy Lévêque 1 N. Lorenzo Martinez 1 P. Mastrandea 1 S. Raspopov 1 E. Sauvan 1 B.H. Smart 1 S. Todorova-Nova 1 A. Vallier 1 I. Wingerter-Seez 1 E. Yatsenko 1 S. Berlendis 2 C. Camincher 2 J. Collot 2 S. Crépé-Renaudin 2 P.A. Delsart 2 C. Gabaldon 2 M.H. Genest 2 J.Y. Hostachy 2 F. Ledroit-Guillon 2 A. Lleres 2 A. Lucotte 2 F. Malek 2 T. Meideck 2 E. Petit 2 N.P. Readioff 2 J. Stark 2 B. Trocmé 2 M.K. Ayoub 3 A. Bassalat 3 S. Binet 3 C. Becot 3 C. Bourdarios 3 J.B. de Vivie De Regie 3 D. Delgove 3 L. Duflot 3 M. Escalier 3 L. Fayard 3 D. Fournier 3 E.L. Gkougkousis 3 J.-F. Grivaz 3 F. Hariri 3 S. Henrot-Versille J. Hrivnac 3 L. Iconomidou-Fayard 3 M. Kado 3 A. Lounis N. Makovec 3 N. Morange 3 C. Nellist 3 P. Petroff 3 L. Poggioli 3 P. Puzo 3 A. Renaud 3 G. Rybkin 3 D. Rousseau A.C. Schaffer 3 L. Serin 3 E. Scifo 3 S. Simion 3 R. Tanaka 2 D. Zerwas 3 Zhongkai Zhang 3 Y. Zhao 3 G. Rahal 4 G. Aad 5 M. Alstaty 5 M. Barbero 5 A. Calandri 5 T.P. Calvet 5 Y. Coadou 5 K. de Vasconcelos Corga 5 C. Diaconu 5 F. Djama 5 R. El Kosseifi 5 V. Ellajosyula 5 L. Feligioni 5 A. Hadef 5 G.D. Hallewell 5 F. Hubaut 5 S.J. Kahn 5 E. B. F. G. Knoops 5 R. Kukla 5 E. Le Guirriec 5 K. Liu D. Madaffari 5 E. Monnier 5 S. Muanza 5 E. Nagy 5 P. Pralavorio 5 Y. Rodina 6, 5 A. Rozanov 5 M. Talby 5 T. Theveneaux-Pelzer 5 R.E. Ticse Torres 5 S. Tisserant 5 J. Toth 7, 5 F. Touchard 5 L. Vacavant 5 R. Wolff 5
Abstract : A measurement of the splitting scales occuring in the $k_\mathrm{t}$ jet-clustering algorithm is presented for final states containing a $Z$ boson. The measurement is done using 20.2 fb$^{-1}$ of proton-proton collision data collected at a centre-of-mass energy of $\sqrt{s} = 8$ TeV by the ATLAS experiment at the LHC in 2012. The measurement is based on charged-particle track information, which is measured with excellent precision in the $p_\mathrm{T}$ region relevant for the transition between the perturbative and the non-perturbative regimes. The data distributions are corrected for detector effects, and are found to deviate from state-of-the-art predictions in various regions of the observables.
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Submitted on : Thursday, April 6, 2017 - 11:03:30 AM
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M. Aaboud, N. Berger, A.M. Burger, M. Delmastro, L. Di Ciaccio, et al.. Measurement of the $k_\mathrm{t}$ splitting scales in $Z \to \ell\ell$ events in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector. Journal of High Energy Physics, Springer Verlag (Germany), 2017, 08 (026), ⟨10.1007/JHEP08(2017)026⟩. ⟨in2p3-01502809⟩

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