Abstract
The observations in the main SM Higgs boson decay channels as discussed in Chap. 4 have lead to the following conclusions: (i) the observation in all three bosonic decay channels is consistent with a single particle resonance; (ii) the two bosonic high mass resolution decay channels \(H\rightarrow \gamma \gamma \) and \(H\rightarrow ZZ\), pin this mass to a value of \(m_{H}\approx 125\) GeV; (iii) there is an evidence that this new particle couples to fermions, with a coupling strength to \(b\)-quarks and \(\tau \)-leptons as expected for a SM Higgs boson with the given mass; (iv) this coupling is non/universal across the lepton generations.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Notes
- 1.
Note that also the coupling of the \(Z\) boson to left- and right-handed particles is different (though not maximally \(P\) violating) as shown in Eq. (2.28).
- 2.
Note that the particles of importance are the leptons in the physical final state and not the intermediate \(Z\) bosons. The \(Z\) bosons do not even have a well defined intrinsic parity due to their parity violating nature.
- 3.
Note that this is also the result of the naive subtraction of the observed significance from the expected significance in the presence of the \(0^{+}\) hypothesis for \(\mu =1\).
References
CMS Collaboration, Observation of the diphoton decay of the Higgs boson and measurement of its properties, Eur. Phys. J. C74(10), 3076 (2014). arXiv:1407.0558
C.M.S. 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, submitted to Eur. Phys, J. C (2014). arXiv:1412.8662
C.M.S. Collaboration, Measurement of the properties of a Higgs boson in the four-lepton final state. Phys. Rev. D89, 092007 (2014). arXiv:1312.5353
Particle Data Group, Chin. Phys. Review of particle physics. C38, 090001 (2014). doi:10.1088/1674-1137/38/9/090001
ATLAS Collaboration, Measurement of the Higgs boson mass from the \(H\rightarrow \gamma \gamma \) and \(H \rightarrow ZZ^{*} \rightarrow 4\ell \) channels with the ATLAS detector using 25 fb\(^{-1}\) of \(pp\) collision data, Phys. Rev. D90, 052004 (2014). arXiv:1406.3827
F. Caola, K. Melnikov, Constraining the Higgs boson Width with \(ZZ\) production at the LHC. Phys. Rev. D88, 054024 (2013). arXiv:1307.4935
C.M.S. Collaboration, Constraints on the Higgs boson width from off-shell production and decay to \(Z\)-boson Pairs. Phys. Lett. B736, 64 (2014). arXiv:1405.3455
N. Kauer, G. Passarino, Inadequacy of zero-width approximation for a light Higgs boson signal. JHEP 1208, 116 (2012). arXiv:1206.4803
N. Kauer, Inadequacy of zero-width approximation for a light Higgs boson signal. Mod. Phys. Lett. A28, 1330015 (2013). arXiv:1305.2092
L. Landau, On the angular momentum of a two-photon system. Dokl. Akad. Nauk Ser. Fiz. 60, 207–209 (1948)
C.-N. Yang, Selection rules for the dematerialization of a particle into two photons. Phys. Rev. 77, 242–245 (1950)
Y. Gao, A.V. Gritsan, Z. Guo et al., Spin determination of single-produced resonances at hadron colliders. Phys. Rev. D81, 075022 (2010). arXiv:1001.3396
S. Bolognesi, Y. Gao, A.V. Gritsan et al., On the spin and parity of a single-produced resonance at the LHC. Phys. Rev. D86, 095031 (2012). arXiv:1208.4018
C.M.S. Collaboration, Measurement of Higgs boson production and properties in the \(WW\) decay channel with leptonic final states. JHEP 1401, 096 (2014). arXiv:1312.1129
C.M.S. Collaboration, Evidence for the 125 GeV Higgs boson decaying to a pair of \(\tau \) leptons. JHEP 1405, 104 (2014). arXiv:1401.5041
CMS Collaboration, Search for a standard model-like Higgs boson in the \(\mu ^+\mu ^-\) and \(e^+e^-\) decay channels at the LHC. Submitted to Phys. Lett. B (2014). arXiv:1410.6679
C.M.S. Collaboration, Search for the standard model Higgs boson produced in association with a \(W\) or a \(Z\) boson and decaying to bottom quarks. Phys. Rev. D89, 012003 (2014). arXiv:1310.3687
C.M.S. Collaboration, Search for the associated production of the Higgs boson with a top-quark pair. JHEP 1409, 087 (2014). arXiv:1408.1682
LHC Higgs Cross Section Working Group, Handbook of LHC Higgs cross sections: 3. Higgs properties, arXiv:1307.1347
Y. Golfand, E. Likhtman, Extension of the algebra of poincare group generators and violation of P invariance. JETP Lett. 13, 323–326 (1971)
J. Wess, B. Zumino, Supergauge transformations in four-dimensions. Nucl. Phys. B70, 39–50 (1974)
P. Fayet, Supergauge invariant extension of the Higgs mechanism and a model for the electron and its neutrino. Nucl. Phys. B90, 104–124 (1975)
P. Fayet, Spontaneously broken supersymmetric theories of weak, electromagnetic and strong interactions. Phys. Lett. B69, 489 (1977)
G. Branco, P. Ferreira, L. Lavoura et al., Theory and phenomenology of two-Higgs-doublet models. Phys. Rep. 516, 1–102 (2012). arXiv:1106.0034
CMS Collaboration, Search for invisible decays of Higgs bosons in the vector boson fusion and associated ZH production modes, Eur. Phys. J. C74(8), 2980 (2014). arXiv:1404.1344
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2015 Springer International Publishing Switzerland
About this chapter
Cite this chapter
Wolf, R. (2015). Properties of the New Particle. In: The Higgs Boson Discovery at the Large Hadron Collider. Springer Tracts in Modern Physics, vol 264. Springer, Cham. https://doi.org/10.1007/978-3-319-18512-5_5
Download citation
DOI: https://doi.org/10.1007/978-3-319-18512-5_5
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-18511-8
Online ISBN: 978-3-319-18512-5
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)