- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- UBC Faculty Research and Publications /
- Constraints on Higgs boson properties using...
Open Collections
UBC Faculty Research and Publications
Constraints on Higgs boson properties using $$WW^{*}(\rightarrow e\nu \mu \nu )jj$$ W W... ATLAS Collaboration
Abstract
This article presents the results of two studies of Higgs boson properties using the $$WW^*(\rightarrow e\nu \mu \nu )jj$$ W W ∗ ( → e ν μ ν ) j j final state, based on a dataset corresponding to $${36.1}{{\mathrm{fb}}^{-1}}$$ 36.1 fb - 1 of $$\sqrt{s}=13$$ s = 13 TeV proton–proton collisions recorded by the ATLAS experiment at the Large Hadron Collider. The first study targets Higgs boson production via gluon–gluon fusion and constrains the CP properties of the effective Higgs–gluon interaction. Using angular distributions and the overall rate, a value of $$\tan (\alpha ) = 0.0 \pm 0.4 (\mathrm {stat.}) \pm 0.3 (\mathrm {syst.})$$ tan ( α ) = 0.0 ± 0.4 ( stat . ) ± 0.3 ( syst . ) is obtained for the tangent of the mixing angle for CP-even and CP-odd contributions. The second study exploits the vector-boson fusion production mechanism to probe the Higgs boson couplings to longitudinally and transversely polarised W and Z bosons in both the production and the decay of the Higgs boson; these couplings have not been directly constrained previously. The polarisation-dependent coupling-strength scale factors are defined as the ratios of the measured polarisation-dependent coupling strengths to those predicted by the Standard Model, and are determined using rate and kinematic information to be $$a_\mathrm {L}=0.91^{+0.10}_{-0.18}$$ a L = 0 . 91 - 0.18 + 0.10 (stat.) $$^{+0.09}_{-0.17}$$ - 0.17 + 0.09 (syst.) and $$a_{\mathrm {T}}=1.2 \pm 0.4 $$ a T = 1.2 ± 0.4 (stat.) $$ ^{+0.2}_{-0.3} $$ - 0.3 + 0.2 (syst.). These coupling strengths are translated into pseudo-observables, resulting in $$\kappa _{VV}= 0.91^{+0.10}_{-0.18}$$ κ VV = 0 . 91 - 0.18 + 0.10 (stat.) $$^{+0.09}_{-0.17}$$ - 0.17 + 0.09 (syst.) and $$\epsilon _{VV} =0.13^{+0.28}_{-0.20}$$ ϵ VV = 0 . 13 - 0.20 + 0.28 (stat.) $$^{+0.08}_{-0.10}$$ - 0.10 + 0.08 (syst.). All results are consistent with the Standard Model predictions.
Item Metadata
| Title |
Constraints on Higgs boson properties using
$$WW^{*}(\rightarrow e\nu \mu \nu )jj$$
W
W
∗
(
→
e
ν
μ
ν
)
j
j
production in
$$36.1\,\mathrm{fb}^{-1}$$
36.1
fb
-
1
of
$$\sqrt{s}=13$$
s
=
13
TeV pp collisions with the ATLAS detector
|
| Creator | |
| Publisher |
Springer Berlin Heidelberg
|
| Date Issued |
2022-07-18
|
| Description |
This article presents the results of two studies of Higgs boson properties using the
$$WW^*(\rightarrow e\nu \mu \nu )jj$$
W
W
∗
(
→
e
ν
μ
ν
)
j
j
final state, based on a dataset corresponding to
$${36.1}{{\mathrm{fb}}^{-1}}$$
36.1
fb
-
1
of
$$\sqrt{s}=13$$
s
=
13
TeV proton–proton collisions recorded by the ATLAS experiment at the Large Hadron Collider. The first study targets Higgs boson production via gluon–gluon fusion and constrains the CP properties of the effective Higgs–gluon interaction. Using angular distributions and the overall rate, a value of
$$\tan (\alpha ) = 0.0 \pm 0.4 (\mathrm {stat.}) \pm 0.3 (\mathrm {syst.})$$
tan
(
α
)
=
0.0
±
0.4
(
stat
.
)
±
0.3
(
syst
.
)
is obtained for the tangent of the mixing angle for CP-even and CP-odd contributions. The second study exploits the vector-boson fusion production mechanism to probe the Higgs boson couplings to longitudinally and transversely polarised W and Z bosons in both the production and the decay of the Higgs boson; these couplings have not been directly constrained previously. The polarisation-dependent coupling-strength scale factors are defined as the ratios of the measured polarisation-dependent coupling strengths to those predicted by the Standard Model, and are determined using rate and kinematic information to be
$$a_\mathrm {L}=0.91^{+0.10}_{-0.18}$$
a
L
=
0
.
91
-
0.18
+
0.10
(stat.)
$$^{+0.09}_{-0.17}$$
-
0.17
+
0.09
(syst.) and
$$a_{\mathrm {T}}=1.2 \pm 0.4 $$
a
T
=
1.2
±
0.4
(stat.)
$$ ^{+0.2}_{-0.3} $$
-
0.3
+
0.2
(syst.). These coupling strengths are translated into pseudo-observables, resulting in
$$\kappa _{VV}= 0.91^{+0.10}_{-0.18}$$
κ
VV
=
0
.
91
-
0.18
+
0.10
(stat.)
$$^{+0.09}_{-0.17}$$
-
0.17
+
0.09
(syst.) and
$$\epsilon _{VV} =0.13^{+0.28}_{-0.20}$$
ϵ
VV
=
0
.
13
-
0.20
+
0.28
(stat.)
$$^{+0.08}_{-0.10}$$
-
0.10
+
0.08
(syst.). All results are consistent with the Standard Model predictions.
|
| Genre | |
| Type | |
| Language |
eng
|
| Date Available |
2023-01-05
|
| Provider |
Vancouver : University of British Columbia Library
|
| Rights |
Attribution 4.0 International (CC BY 4.0)
|
| DOI |
10.14288/1.0422964
|
| URI | |
| Affiliation | |
| Citation |
The European Physical Journal C. 2022 Jul 18;82(7):622
|
| Publisher DOI |
10.1140/epjc/s10052-022-10366-1
|
| Peer Review Status |
Reviewed
|
| Scholarly Level |
Faculty; Researcher; Other
|
| Copyright Holder |
The Author(s)
|
| Rights URI | |
| Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
Attribution 4.0 International (CC BY 4.0)