Search for the $b\bar{b}$ decay of the Standard Model Higgs boson in associated $(W/Z)H$ production with the ATLAS detector

G. Aad; S. Albrand; J. Brown; J. Collot; S. Crépé-Renaudin; B. Dechenaux; P.A. Delsart; C. Gabaldon; M.H. Genest; J.Y. Hostachy; F. Ledroit-Guillon; A. Lleres; A. Lucotte; F. Malek; C. Monini; J. Stark; B. Trocmé; M. Wu; G. Rahal; S. Abdel Khalek; A. Bassalat; C. Becot; S. Binet; C. Bourdarios; D. Charfeddine; J.B. De Vivie de Regie; L. Duflot; M. Escalier; L. Fayard; D. Fournier; J.-F. Grivaz; T. Guillemin; F. Hariri; S. Henrot-Versillé; J. Hrivnac; L. Iconomidou-Fayard; M. Kado; A. Lounis; N. Makovec; L. Poggioli; P. Puzo; A. Renaud; D. Rousseau; G. Rybkin; A.C. Schaffer; E. Scifo; L. Serin; S. Simion; R. Tanaka; H.L. Tran; D. Zerwas; Zhen Zhang; D. Boumediene; Emmanuel Busato; D. Calvet; S. Calvet; J. Donini; E. Dubreuil; N. Ghodbane; G. Gilles; Ph. Gris; C. Guicheney; H. Liao; D. Pallin; Daniela Paredes Hernández; F. Podlyski; C. Santoni; Timothée Theveneaux-Pelzer; Loïc Valery; F. Vazeille; Z. Barnovska; N. Berger; J. Colas; M. Delmastro; L. Di Ciaccio; S. Elles; C. Goy; T. Hryn'Ova; S. Jézéquel; H. Keoshkerian; I. Koletsou; R. Lafaye; J. Leveque; V.P. Lombardo; N. Massol; P. Perrodo; H. Przysiezniak; G. Sauvage; E. Sauvan; M. Schwoerer; O. Simard; T. Todorov; I. Wingerter-Seez; L. Alio; M. Barbero; J. C. Clémens; Y. Coadou; S. Diglio; F. Djama; L. Feligioni; G.D. Hallewell; D. Hoffmann; F. Hubaut; E. B. F. G. Knoops; E. Le Guirriec; B. Li; D. Madaffari; K. Mochizuki; E. Monnier; S. Muanza; Y. Nagai; P. Pralavorio; A. Rozanov; T. Serre; M. Talby; E. Tiouchichine; S. Tisserant; J. Toth; F. Touchard; M. Ughetto; L. Vacavant

doi:10.1007/JHEP01(2015)069

Search for the $b\bar{b}$ decay of the Standard Model Higgs boson in associated $(W/Z)H$ production with the ATLAS detector

G. Aad ¹ S. Albrand ² J. Brown ² J. Collot ² S. Crépé-Renaudin ² B. Dechenaux 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 C. Monini ² J. Stark ² B. Trocmé ² M. Wu ² G. Rahal ³ S. Abdel Khalek ⁴ A. Bassalat ⁴ C. Becot ⁴ S. Binet ⁴ C. Bourdarios ⁴ D. Charfeddine ⁴ J.B. De Vivie de Regie ⁴ L. Duflot ⁴ M. Escalier ⁴ L. Fayard ⁴ D. Fournier ⁴ J.-F. Grivaz ⁴ T. Guillemin ⁴ F. Hariri ⁴ S. Henrot-Versillé ⁴ J. Hrivnac ⁴ L. Iconomidou-Fayard ⁴ M. Kado ⁴ A. Lounis ⁴ N. Makovec ⁴ L. Poggioli ⁴ P. Puzo ⁴ A. Renaud ⁴ D. Rousseau ⁴ G. Rybkin ⁴ A.C. Schaffer ⁴ E. Scifo ⁴ L. Serin ⁴ S. Simion ⁴ R. Tanaka ⁴ H.L. Tran ⁴ D. Zerwas ⁴ Zhen Zhang ⁴ D. Boumediene ⁵ Emmanuel Busato ⁵ D. Calvet ⁵ S. Calvet ⁵ J. Donini ⁵ E. Dubreuil ⁵ N. Ghodbane ⁵ G. Gilles ⁵ Ph. Gris ⁵ C. Guicheney ⁵ H. Liao ⁵ D. Pallin ⁵ Daniela Paredes Hernández ⁵ F. Podlyski ⁵ C. Santoni ⁵ Timothée Theveneaux-Pelzer ⁵ Loïc Valery ⁵ F. Vazeille ⁵ Z. Barnovska ⁶ N. Berger ⁶ J. Colas ⁶ M. Delmastro ⁶ L. Di Ciaccio ⁶ S. Elles ⁶ C. Goy ⁶ T. Hryn'Ova ⁶ S. Jézéquel ⁶ H. Keoshkerian ⁶ I. Koletsou ⁶ R. Lafaye ⁶ J. Leveque ⁶ V.P. Lombardo ⁶ N. Massol ⁶ P. Perrodo ⁶ H. Przysiezniak ⁶ G. Sauvage ⁶ E. Sauvan ⁶ M. Schwoerer ⁶ O. Simard ⁶ T. Todorov ⁶ I. Wingerter-Seez ⁶ L. Alio ¹ M. Barbero ¹ J. C. Clémens ¹ Y. Coadou ¹ S. Diglio ¹ F. Djama ¹ L. Feligioni ¹ G.D. Hallewell ¹ D. Hoffmann ¹ F. Hubaut ¹ E. B. F. G. Knoops ¹ E. Le Guirriec ¹ B. Li ¹ D. Madaffari ¹ K. Mochizuki ¹ E. Monnier ¹ S. Muanza ¹ Y. Nagai ¹ P. Pralavorio ¹ A. Rozanov ¹ T. Serre ¹ M. Talby ¹ E. Tiouchichine ¹ S. Tisserant ¹ J. Toth ¹ F. Touchard ¹ M. Ughetto ¹ L. Vacavant ¹

1 CPPM - Centre de Physique des Particules de Marseille

2 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

3 CC-IN2P3 - Centre de Calcul de l'IN2P3

4 LAL - Laboratoire de l'Accélérateur Linéaire

5 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand

6 LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules - Laboratoire d'Annecy de Physique des Particules

Abstract : A search for the $b\bar{b}$ decay of the Standard Model Higgs boson is performed with the ATLAS experiment using the full dataset recorded at the LHC in Run 1. The integrated luminosities used from $pp$ collisions at $\sqrt{s}=7$ and 8 TeV are 4.7 and 20.3 fb$^{-1}$, respectively. The processes considered are associated $(W/Z)H$ production, where $W\to e\nu/\mu\nu$, $Z\to ee/\mu\mu$ and $Z\to\nu\nu$. The observed (expected) deviation from the background-only hypothesis corresponds to a significance of 1.4 (2.6) standard deviations and the ratio of the measured signal yield to the Standard Model expectation is found to be $\mu = 0.52 \pm 0.32 \mathrm{(stat.)} \pm 0.24 \mathrm{(syst.)}$ for a Higgs boson mass of 125.36 GeV. The analysis procedure is validated by a measurement of the yield of $(W/Z)Z$ production with $Z\to b\bar{b}$ in the same final states as for the Higgs boson search, from which the ratio of the observed signal yield to the Standard Model expectation is found to be $0.74 \pm 0.09 \mathrm{(stat.)} \pm 0.14 \mathrm{(syst.)}$.

Type de document :

Article dans une revue

Journal of High Energy Physics, Springer, 2015, 2015 (1), pp.69. 〈10.1007/JHEP01(2015)069〉

Domaine :

Physique [physics] / Physique des Hautes Energies - Expérience [hep-ex]

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Search for the $b\bar{b}$ decay of the Standard Model Higgs boson in associated $(W/Z)H$ production with the ATLAS detector

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Search for the $b\bar{b}$ decay of the Standard Model Higgs boson in associated $(W/Z)H$ production with the ATLAS detector

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