Gauge-invariant description of the Higgs resonance and its phenomenological implications
Gauge-invariant description of the Higgs resonance and its phenomenological implications
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希格斯共振的规范不变描述及其现象学含义
DOI:
10.1103/physrevd.102.113001
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发表时间:
--
影响因子:
5
通讯作者:
René Sondenheimer
中科院分区:
文献类型:
--
作者:
Axel Maas;René Sondenheimer
We investigate the phenomenological consequences of a strict gauge-invariant formulation of the Higgs particle. This requires a description of the observable scalar particle in terms of a bound state structure. Although this seems to be at odds with the common treatment of electroweak particle physics at first glance, the properties of the bound state can be described in a perturbative fashion due to the Fröhlich-Morchio-Strocchi (FMS) framework. In particular a relation between the bound-state Higgs and the elementary Higgs field is obtained withingauges such that the main quantitative properties of the conventional description reappear in leading order of the FMS expansion. Going beyond leading order, we show that the pole structure of the elementary and the bound-state propagator coincide to all orders in a perturbative expansion. However, slight deviations of scattering amplitudes containing off-shell Higgs contributions can be caused by the internal bound state structure. We perform a consistent perturbative treatment to all orders in the FMS expansion to quantify such deviations and demonstrate how gauge-invariant expressions arrange in a natural way at the one-loop level. This also provides a gauge-invariant Higgs spectral function which is not plagued by positivity violations or unphysical thresholds. Furthermore, the mass extracted from the gauge-invariant bound state is only logarithmically sensitive to the scale of new physics at one-loop order in contrast to its elementary counterpart.
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影响因子:
5
作者:
B. Kniehl;A. Sirlin
通讯作者:
A. Sirlin
DOI:
10.1142/s0217732313501034
发表时间:
2012-05
期刊:
arXiv: High Energy Physics - Lattice
影响因子:
--
作者:
A. Maas
通讯作者:
A. Maas
DOI:
10.1103/physrevd.53.2128
发表时间:
1995
期刊:
Physical review. D, Particles and fields
影响因子:
--
作者:
Papavassiliou;Pilaftsis
通讯作者:
Pilaftsis
影响因子:
5
作者:
T. Heinzl;A. Ilderton;K. Langfeld;M. Lavelle;D. McMullan
通讯作者:
D. McMullan
影响因子:
5
作者:
M. Capri;I. Justo;L. Palhares;G. Peruzzo;S. P. Sorella
通讯作者:
S. P. Sorella