Time to Go Beyond Triple-Gauge-Boson-Coupling Interpretation of W Pair Production
| Autor: | Zhengkang Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Particle physics Large Hadron Collider Physics::Instrumentation and Detectors 010308 nuclear & particles physics Physics beyond the Standard Model High Energy Physics::Phenomenology Electroweak interaction FOS: Physical sciences General Physics and Astronomy Gauge (firearms) 01 natural sciences High Energy Physics - Experiment Standard Model High Energy Physics - Phenomenology High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology (hep-ph) Pair production 0103 physical sciences ddc:550 Effective field theory 010306 general physics Boson |
| Zdroj: | Physical review letters 118(1), 011803 (2017). doi:10.1103/PhysRevLett.118.011803 |
| DOI: | 10.3204/pubdb-2017-00562 |
| Popis: | Physical review letters 118(1), 011803(2017). doi:10.1103/PhysRevLett.118.011803 W boson pair production processes at $e^{+}e^−$ and pp colliders have been conventionally interpreted as measurements of WWZ and WWγ triple gauge couplings (TGCs). Such an interpretation is based on the assumption that new physics effects other than anomalous TGCs are negligible. While this “TGC dominance assumption” was well motivated and useful at LEP2 thanks to precision electroweak constraints, it is already challenged by recent LHC data. In fact, contributions from anomalous Z boson couplings that are allowed by electroweak precision data but neglected in LHC analyses, which are enhanced at high energy, can even dominate over those from the anomalous TGCs considered. This limits the generality of the anomalous TGC constraints derived in current analyses and necessitates extension of the analysis framework and a change of physics interpretation. The issue will persist as we continue to explore the high-energy frontier. We clarify and analyze the situation in the effective field theory framework, which provides a useful organizing principle for understanding standard model deviations in the high-energy regime. Published by APS, College Park, Md. |
| Databáze: | OpenAIRE |
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