CMS-PAS-HIG-16-031

CMS-PAS-HIG-16-031
Search for charged Higgs bosons with the $\mathrm{H}^{\pm}\rightarrow \tau^{\pm}\nu_{\tau}$ decay channel in the fully hadronic final state at $\sqrt{s} = $ 13 TeV
CMS Collaboration
October 2016

Abstract: A search for charged Higgs bosons in decays of $\mathrm{H}^{\pm}\rightarrow \tau^{\pm}\nu_{\tau}$ is presented both with mass larger than the top quark in the ${\rm pp} \rightarrow \mathrm{H}^{\pm}{\rm tb}$ production process, and lighter than the top quark in the ${\rm pp} \rightarrow \mathrm{H}^{\pm}\mathrm{W}^{\mp}{\rm b\bar{b}}$ channel. The fully hadronic final state is considered. The search is performed using the 2016 data collected by CMS at $\sqrt{s}= $ 13 TeV, and that correspond to a total integrated luminosity of 12.9 fb$^{-1}$. The observation agrees with the standard model prediction. Limits on the charged Higgs boson cross section times branching fraction are set for the mass range of 180 GeV $ < m_{\mathrm{H}^{\pm}} < $ 3 TeV, while limits on the branching fraction of top quark to charged Higgs boson are set in the mass range of 80 to 160 GeV, and results are interpreted in the context of two-Higgs-doublet models.
Links: CDS record (PDF) ; inSPIRE record ; CADI line (restricted) ;

Figures & Tables	Summary	References	CMS Publications

Figures
png pdf	Figure 1: Examples of charged Higgs boson ($\mathrm{H}^{\pm} $) production diagrams for the light-mass scenario as part of the decay of the top quark (left) and for the heavy mass scenario in association with top and bottom quark (right).
png pdf	Figure 2: Data/simulation of the trigger efficiency for the hadronic tau transverse momentum (left) and the missing transverse energy (right) parts of the ${ {\tau ^\text {h}}}$ plus $ E_{\mathrm{T}}^{\text{miss}} $ trigger, respectively.
png pdf	Figure 2-a: Data/simulation of the trigger efficiency for the hadronic tau transverse momentum part of the ${ {\tau ^\text {h}}}$ plus $ E_{\mathrm{T}}^{\text{miss}} $ trigger.
png pdf	Figure 2-b: Data/simulation of the trigger efficiency for the missing transverse energy part of the ${ {\tau ^\text {h}}}$ plus $ E_{\mathrm{T}}^{\text{miss}} $ trigger.
png pdf	Figure 3: Sketch of the plane $\Delta \phi ({ {\tau ^\text {h}}}, E_{\mathrm{T}}^{\text{miss}})$-$\Delta \phi ({ {\tau ^\text {h}}},j_n)$ and its connection to the $ {R_\text {bb}^\text {min}}$ variable (left), and the angular variable $ {R_\text {bb}^\text {min}}$ after the all selection except the self requirement (right); the data points (solid black) with their statistical uncertainty (solid lines) are compared to the background predictions split for the different contributions (filled histograms).
png pdf	Figure 3-a: Sketch of the plane $\Delta \phi ({ {\tau ^\text {h}}}, E_{\mathrm{T}}^{\text{miss}})$-$\Delta \phi ({ {\tau ^\text {h}}},j_n)$ and its connection to the $ {R_\text {bb}^\text {min}}$ variable.
png pdf	Figure 3-b: The angular variable $ {R_\text {bb}^\text {min}}$ after the all selection except the self requirement. The data points (solid black) with their statistical uncertainty (solid lines) are compared to the background predictions split for the different contributions (filled histograms).
png pdf	Figure 4: Sequential selection requirements in the high mass analysis comparing background predictions to data.
png pdf	Figure 5: The ${m_\text {T}}{}$ distribution in data compared to the post-fit background predictions for the low- (left) and high-mass (right) search selection.
png pdf	Figure 5-a: The ${m_\text {T}}{}$ distribution in data compared to the post-fit background predictions for the high-mass search selection.
png pdf	Figure 5-b: The ${m_\text {T}}{}$ distribution in data compared to the post-fit background predictions for the low- (left) and high-mass (right) search selection.
png pdf	Figure 6: The observed 95% CL exclusion limits (solid points) on $\mathcal {B}(\mathrm{ t } \rightarrow \mathrm{ b } \mathrm{H}^{\pm} ) \times \mathcal {B}(\mathrm{H}^{\pm} \rightarrow \tau ^{\pm }\nu _\tau )$ (left) and $\sigma (\mathrm{ p } \mathrm{ p } \rightarrow \mathrm{H}^{\pm} {\mathrm {W}}^{\mp }\mathrm{ b \bar{b} } )\times \mathcal {B}(\mathrm{H}^{\pm} \rightarrow \tau ^{\pm }\nu _\tau )$ (right) is compared to the expectations from the SM model (dashed line). The green (yellow) error bands represent one (two) standard deviations of the expected limit.
png pdf	Figure 6-a: The observed 95% CL exclusion limits (solid points) on $\mathcal {B}(\mathrm{ t } \rightarrow \mathrm{ b } \mathrm{H}^{\pm} ) \times \mathcal {B}(\mathrm{H}^{\pm} \rightarrow \tau ^{\pm }\nu _\tau )$ is compared to the expectations from the SM model (dashed line). The green (yellow) error bands represent one (two) standard deviations of the expected limit.
png pdf	Figure 6-b: The observed 95% CL exclusion limits (solid points) on $\sigma (\mathrm{ p } \mathrm{ p } \rightarrow \mathrm{H}^{\pm} {\mathrm {W}}^{\mp }\mathrm{ b \bar{b} } )\times \mathcal {B}(\mathrm{H}^{\pm} \rightarrow \tau ^{\pm }\nu _\tau )$ is compared to the expectations from the SM model (dashed line). The green (yellow) error bands represent one (two) standard deviations of the expected limit.
png pdf	Figure 7: Exclusion limits in the $ {m_{\mathrm{ H } ^\pm }}$-$\tan\beta $ plane in the context of the $m_{\mathrm{h}}^{\text{mod+}}$ model, for the low mass search (left) and the high mass search (right).
png pdf	Figure 7-a: Exclusion limits in the $ {m_{\mathrm{ H } ^\pm }}$-$\tan\beta $ plane in the context of the $m_{\mathrm{h}}^{\text{mod+}}$ model, for the low mass search.
png pdf	Figure 7-b: Exclusion limits in the $ {m_{\mathrm{ H } ^\pm }}$-$\tan\beta $ plane in the context of the $m_{\mathrm{h}}^{\text{mod+}}$ model, for the high mass search.

Tables
png pdf	Table 1: Number of selected events for the low-mass and high-mass searches in data and corresponding predictions for the 2016 data-taking periods.

Summary

We presented a search for charged Higgs bosons decaying to $\mathrm{H}^{\pm}\rightarrow \tau^{\pm}\nu_\tau$ in the fully hadronic final state. The charged Higgs bosons can be produced in top quark decays $pp\rightarrow \mathrm{H}^{\pm}\mathrm{W}^{\mp}\mathrm{b }\mathrm{ \bar{b} }$, if the charged Higgs boson is lighter than the top quark, or via direct production ${\rm pp} \rightarrow \mathrm{t }(\mathrm{b })\mathrm{H}^{\pm}$ in association with a top quark at high masses. In both cases the experimental final state is similar. The search is performed using data collected in 2016 by CMS at $\sqrt{s}=13$ TeV, corresponding to a total integrated luminosity of 12.9 fb$^{-1}$. The observation agrees with the standard model prediction. Model independent limits on charged Higgs bosons branching fraction $\mathcal{B}(\mathrm{t }\rightarrow\mathrm{H}^{\pm} \mathrm{b })\times \mathcal{B}(\mathrm{H}^{\pm}\rightarrow\tau\nu)$ and the cross section times branching fraction $\sigma_{ \mathrm{pp} \rightarrow\mathrm{t }(\mathrm{b })\mathrm{H}^{\pm}}\times \mathcal{B}(\mathrm{H}^{\pm}\rightarrow\tau\nu)$ are given for the mass ranges of 80 GeV $ < m_{\mathrm{H}^{\pm}} <$ 160 GeV and 180 GeV $ < m_{\mathrm{H}^{\pm}} < $ 3 TeV, respectively. The results are interpreted in the context of the MSSM $m_{\mathrm{h}}^{\text{mod+}}$ benchmark scenario.

References
1	ATLAS Collaboration	Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC	PLB 716 (2012) 1--29	1207.7214
2	CMS Collaboration	Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC	PLB 716 (2012) 30--61	CMS-HIG-12-028 1207.7235
3	CMS Collaboration	Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV	EPJC 75 (2015), no. 5, 212	CMS-HIG-14-009 1412.8662
4	ATLAS Collaboration	Study of the spin and parity of the Higgs boson in diboson decays with the ATLAS detector	EPJC 75 (2015), no. 10, 476	1506.05669
5	CMS Collaboration	Constraints on the spin-parity and anomalous HVV couplings of the Higgs boson in proton collisions at 7 and 8 TeV	PRD 92 (2015), no. 1, 012004	CMS-HIG-14-018 1411.3441
6	F. Englert and R. Brout	Broken Symmetry and the Mass of Gauge Vector Mesons	PRL 13 (1964) 321
7	P. W. Higgs	Broken symmetries, massless particles and gauge fields	PL12 (1964) 132
8	P. W. Higgs	Broken Symmetries and the Masses of Gauge Bosons	PRL 13 (1964) 508
9	G. S. Guralnik, C. R. Hagen, and T. W. B. Kibble	Global Conservation Laws and Massless Particles	PRL 13 (1964) 585
10	P. W. Higgs	Spontaneous Symmetry Breakdown without Massless Bosons	PR145 (1966) 1156
11	T. W. B. Kibble	Symmetry breaking in non-Abelian gauge theories	PR155 (1967) 1554
12	N. Craig and S. Thomas	Exclusive signals of an extended Higgs sector	Journal of High Energy Physics 2012 (2012), no. 11, 1--28
13	G. C. Branco et al.	Theory and phenomenology of two-Higgs-doublet models	PR 516 (2012) 1--102	1106.0034
14	A. Djouadi	The Anatomy of electro-weak symmetry breaking. II. The Higgs bosons in the minimal supersymmetric model	PR 459 (2008) 1--241	hep-ph/0503173
15	Ch. Englert, E. Re, and M. Spannowsky	Triplet Higgs boson collider phenomenology after the LHC	PRD 87 (2013) 095014	1302.6505
16	Ch. Englert, E. Re, and M. Spannowsky	Pinning down Higgs triplets at the LHC	PRD 88 (2013) 035024	1306.6228
17	LEP, DELPHI, OPAL, ALEPH, L3 Collaboration	Search for Charged Higgs bosons: Combined Results Using LEP Data	EPJC73 (2013) 2463	1301.6065
18	CDF Collaboration	Search for Higgs bosons predicted in two-Higgs-doublet models via decays to tau lepton pairs in 1.96-TeV p anti-p collisions	PRL 103 (2009) 201801	0906.1014
19	D0 Collaboration	Search for Higgs bosons of the minimal supersymmetric standard model in $ p\bar{p} $ collisions at $ \sqrt(s)=$ 1.96 TeV	PLB710 (2012) 569--577	1112.5431
20	CMS Collaboration	Search for a charged Higgs boson in pp collisions at $ \sqrt{s}=$ 8 TeV	JHEP 11 (2015) 018	CMS-HIG-14-023 1508.07774
21	CMS Collaboration	Description and performance of track and primary-vertex reconstruction with the CMS tracker	JINST 9 (2014) P10009	CMS-TRK-11-001 1405.6569
22	CMS Collaboration	The CMS experiment at the CERN LHC	JINST 3 (2008) S08004	CMS-00-001
23	J. Alwall et al.	The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations	JHEP 07 (2014) 079	1405.0301
24	S. Alioli, P. Nason, C. Oleari, and E. Re	NLO single-top production matched with shower in POWHEG: s- and t-channel contributions	JHEP 09 (2009) 111, , [Erratum: JHEP02,011(2010)]	0907.4076
25	S. Alioli, P. Nason, C. Oleari, and E. Re	NLO single-top production matched with shower in POWHEG: s- and t-channel contributions	JHEP 09 (2009) 111, , [Erratum: JHEP02,011(2010)]	0907.4076
26	E. Re	Single-top Wt-channel production matched with parton showers using the POWHEG method	EPJC71 (2011) 1547	1009.2450
27	T. Ježo et al.	An NLO+PS generator for $ t\bar{t} $ and $ Wt $ production and decay including non-resonant and interference effects		1607.04538
28	J. Alwall et al.	MadGraph 5 : Going Beyond	JHEP 06 (2011) 128	1106.0522
29	P. Nason and G. Zanderighi	$ W^+ W^- $ , $ W Z $ and $ Z Z $ production in the POWHEG-BOX-V2	EPJC74 (2014), no. 1	1311.1365
30	T. Sjostrand, S. Mrenna, and P. Z. Skands	A Brief Introduction to PYTHIA 8.1	CPC 178 (2008) 852--867	0710.3820
31	CMS Collaboration	Event generator tunes obtained from underlying event and multiparton scattering measurements	EPJC76 (2016), no. 3, 155	CMS-GEN-14-001 1512.00815
32	GEANT4 Collaboration	GEANT4: A Simulation toolkit	NIMA506 (2003) 250--303
33	CMS Collaboration	Particle--Flow Event Reconstruction in CMS and Performance for Jets, Taus, and $ E_{\mathrm{T}}^{\text{miss}} $	CDS
34	CMS Collaboration	Commissioning of the Particle-flow Event Reconstruction with the first LHC collisions recorded in the CMS detector	CDS
35	K. Rose	Deterministic annealing for clustering, compression, classification, regression, and related optimization problems	Proceedings of the IEEE 86 (Nov, 1998) 2210--2239
36	CMS Collaboration	Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at $ \sqrt{s} = $ 8 TeV	JINST 10 (2015) P06005	CMS-EGM-13-001 1502.02701
37	CMS Collaboration	Performance of CMS muon reconstruction in $ \mathrm{ p }\mathrm{ p } $ collision events at $ \sqrt{s}=$ 7 TeV	JINST 7 (2012) P10002	CMS-MUO-10-004 1206.4071
38	M. Cacciari, G. P. Salam, and G. Soyez	FastJet user manual	EPJC 72 (2012) 1896	1111.6097
39	M. Cacciari and G. P. Salam	Dispelling the $ N^{3} $ myth for the $ k_t $ jet-finder	PLB 641 (2006) 57	hep-ph/0512210
40	CMS Collaboration	Identification of b-quark jets with the CMS experiment	JINST 8 (2013) P04013	CMS-BTV-12-001 1211.4462
41	CMS Collaboration	Reconstruction and identification of $ \tau $ lepton decays to hadrons and $ \nu_\tau $ at CMS	JINST 11 (2016), no. 01, P01019	CMS-TAU-14-001 1510.07488
42	Particle Data Group Collaboration	Review of Particle Physics	CPC38 (2014) 090001
43	A. L. Read	Presentation of search results: the CLs technique	JPG28 (2002) 2693
44	T. Junk	Confidence level computation for combining searches with small statistics	NIMA434 (1999) 435	9902006
45	ATLAS and CMS Collaborations	Procedure for the LHC Higgs boson search combination in summer 2011	Technical Report ATL-PHYS-PUB-2011-011, CMS NOTE-2011/005, CERN
46	L. Moneta et al.	The RooStats Project	in 13th International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT2010)	1009.1003
47	M. Carena et al.	MSSM Higgs Boson Searches at the LHC: Benchmark Scenarios after the Discovery of a Higgs-like Particle	EPJC73 (2013), no. 9	1302.7033