Higgs and Z boson associated production via gluon fusion in the SM and the 2HDM

Hespel, B.; Maltoni, F.; Vryonidou, E.

doi:10.1007/JHEP06(2015)065

Higgs and Z boson associated production via gluon fusion in the SM and the 2HDM

Mar 5, 2015

29 pages

Published in:

JHEP 06 (2015) 065

Published: Jun 11, 2015

e-Print:

1503.01656 [hep-ph]

DOI:

10.1007/JHEP06(2015)065

Report number:

CP3-15-05,
MCNET-15-04

View in:

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Abstract: (Springer)

We analyse the associated production of Higgs and Z boson via heavy-quark loops at the LHC in the Standard Model and beyond. We first review the main features of the Born 2 → 2 production, and in particular discuss the high-energy behaviour, angular distributions and Z boson polarisation. We then consider the effects of extra QCD radiation as described by the 2 → 3 loop matrix elements, and find that they dominate at high Higgs transverse momentum. We show how merged samples of 0- and 1-jet multiplicities, matched to a parton shower can provide a reliable description of differential distributions in ZH production. In addition to the Standard Model study, results in a generic two-Higgs-doublet-model are obtained and presented for a set of representative and experimentally viable benchmarks for Zh

^{0}

, ZH

^{0}

and ZA

^{0}

production. We observe that various interesting features appear either due to the resonant enhancement of the cross-section or to interference patterns between resonant and non-resonant contributions.

Note:

29 pages, 12 figures

Higgs Physics
Standard Model
Beyond Standard Model
new physics
standard model
Higgs particle: doublet: 2
CERN LHC Coll
p p: scattering
p p: cross section
cross section: enhancement

References(90)

Figures(18)

[1]

Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC

ATLAS

Collaboration

•

Georges Aad
(
- Freiburg U.
)

et al.

- Phys.Lett.B 716 (2012) 1-29
•
e-Print:
- 1207.7214
•
DOI:
- 10.1016/j.physletb.2012.08.020

[2]

Observation of a New Boson at a Mass of 125 GeV with the CMS Experiment at the LHC

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Lett.B 716 (2012) 30-61
•
e-Print:
- 1207.7235
•
DOI:
- 10.1016/j.physletb.2012.08.021

[3]

Implications of Dynamical Symmetry Breaking

Steven Weinberg
(
- Harvard U.
)

- Phys.Rev.D 13 (1976) 974-996,
- Phys.Rev.D 19 (1979) 1277-1280 (addendum),
- Also in *Farhi, E. (ed.), Jackiw, R. (ed.): Dynamical Gauge Symmetry Breaking*, 127-149
•
DOI:
- 10.1103/PhysRevD.19.1277

[4]

Broken Symmetry and the Mass of Gauge Vector Mesons

F. Englert
(
- Brussels U.
)
,
R. Brout
(
- Brussels U.
)

- Phys.Rev.Lett. 13 (1964) 321-323,
- Also in *Lai, C. H. (ed.): Gauge Theory Of Weak and Electromagnetic Interactions*, 127-129,
•
DOI:
- 10.1103/PhysRevLett.13.321

[5]

Broken Symmetries and the Masses of Gauge Bosons

Peter W. Higgs
(
- Edinburgh U.
)

- Phys.Rev.Lett. 13 (1964) 508-509,
- Also in *Lichtenberg, D. B. (Ed.), Rosen, S. P. (Ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 155-156,
•
DOI:
- 10.1103/PhysRevLett.13.508