CMSPublic Web>TTHCombMoriond2016 (2016-04-01, GuillelmoCeballos)

ttH Combination

Figure	Description
pdf, png	Combined signal strength measurement of the ttH production process, $\mu_{\text{ttH}}$, via the decays of the Higgs boson to the $\gamma\gamma$ (HIG-15-005, ttH-tag categories only), multilepton (HIG-15-008) and bb (HIG-16-004) final states using $2.3-2.7 \text{fb}^{-1}$ of data collected at $\sqrt{s}$ = 13 CMS.TeV. The measurement is made assuming a fixed Higgs boson mass of 125 CMS.GeV. The theoretical systematic uncertainties impacting the signal, namely the QCD scale and pdf uncertainties, are treated as fully correlated between channels. For experimental uncertainties, the luminosity uncertainty is treated as fully correlated between the three channels, and the b-tag uncertainties are treated as fully correlated between the bb and multilepton channels. For the combination of all ttH channels, the best-fit value of $\mu_{\text{ttH}}$ is $0.15 ^{+0.95}_{-0.81}$, compared to the standard model expectation of $1.00 ^{+0.96}_{-0.85}$. The small contributions from Higgs production modes other than ttH are constrained to the standard model expectations and can vary within the standard theoretical and experimental uncertainties.
pdf, png	95% confidence level upper limits on the rate of ttH production relative to the standard model expectation ($\mu_{\text{ttH}}$ = 1) via the decays of the Higgs boson to the $\gamma\gamma$ (HIG-15-005, ttH-tag categories only), multilepton (HIG-15-008) and bb (HIG-16-004) final states using $2.3-2.7 \text{fb}^{-1}$ of data collected at $\sqrt{s}$ = 13 CMS.TeV. From the combination of these channels the observed (expected) limit on $\mu_{\text{ttH}}$ is 2.1 (1.9), assuming a Higgs boson mass of 125 CMS.GeV. The theoretical systematic uncertainties impacting the signal, namely the QCD scale and pdf uncertainties, are treated as fully correlated between channels. For experimental uncertainties, the luminosity uncertainty is treated as fully correlated between the three channels, and the b-tag uncertainties are treated as fully correlated between the bb and multilepton channels. The small contributions from Higgs production modes other than ttH are constrained to the standard model expectations and can vary within the standard theoretical and experimental uncertainties.

Combined signal strength measurement of the ttH production process, $\mu_{\text{ttH}}$, via the decays of the Higgs boson to the $\gamma\gamma$ (HIG-15-005, ttH-tag categories only), multilepton (HIG-15-008) and bb (HIG-16-004) final states using $2.3-2.7 \text{fb}^{-1}$ of data collected at $\sqrt{s}$ = 13 CMS.TeV. The measurement is made assuming a fixed Higgs boson mass of 125 CMS.GeV. The theoretical systematic uncertainties impacting the signal, namely the QCD scale and pdf uncertainties, are treated as fully correlated between channels. For experimental uncertainties, the luminosity uncertainty is treated as fully correlated between the three channels, and the b-tag uncertainties are treated as fully correlated between the bb and multilepton channels. For the combination of all ttH channels, the best-fit value of $\mu_{\text{ttH}}$ is $0.15 ^{+0.95}_{-0.81}$, compared to the standard model expectation of $1.00 ^{+0.96}_{-0.85}$. The small contributions from Higgs production modes other than ttH are constrained to the standard model expectations and can vary within the standard theoretical and experimental uncertainties.

pdf, png

95% confidence level upper limits on the rate of ttH production relative to the standard model expectation ($\mu_{\text{ttH}}$ = 1) via the decays of the Higgs boson to the $\gamma\gamma$ (HIG-15-005, ttH-tag categories only), multilepton (HIG-15-008) and bb (HIG-16-004) final states using $2.3-2.7 \text{fb}^{-1}$ of data collected at $\sqrt{s}$ = 13 CMS.TeV. From the combination of these channels the observed (expected) limit on $\mu_{\text{ttH}}$ is 2.1 (1.9), assuming a Higgs boson mass of 125 CMS.GeV. The theoretical systematic uncertainties impacting the signal, namely the QCD scale and pdf uncertainties, are treated as fully correlated between channels. For experimental uncertainties, the luminosity uncertainty is treated as fully correlated between the three channels, and the b-tag uncertainties are treated as fully correlated between the bb and multilepton channels. The small contributions from Higgs production modes other than ttH are constrained to the standard model expectations and can vary within the standard theoretical and experimental uncertainties.

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who
pdf	CMS_ttH_comb.pdf	r1	manage	16.5 K	2016-03-30 - 11:06	AndrewGilbert
png	CMS_ttH_comb.png	r1	manage	297.8 K	2016-03-29 - 23:38	AndrewGilbert
pdf	ttH_comb_limit.pdf	r2 r1	manage	14.1 K	2016-04-01 - 11:05	AndrewGilbert
png	ttH_comb_limit.png	r2 r1	manage	241.8 K	2016-04-01 - 11:05	AndrewGilbert

Topic revision: r2 - 2016-04-01 - GuillelmoCeballos

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