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Hadronic τ Decays a...
Hadronic τ Decays as New Physics Probes in the LHC Era
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- Cirigliano, Vincenzo (author)
- Los Alamos National Laboratory
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- Falkowski, Adam (author)
- University of Paris-Saclay
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- González-Alonso, Martín (author)
- CERN
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- Rodríguez-Sánchez, Antonio (author)
- Lund University,Lunds universitet,Teoretisk partikelfysik - Har omorganiserats,Institutionen för astronomi och teoretisk fysik - Har omorganiserats,Naturvetenskapliga fakulteten,Theoretical Particle Physics - Has been reorganised,Department of Astronomy and Theoretical Physics - Has been reorganised,Faculty of Science,University of Valencia
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(creator_code:org_t)
- 2019
- 2019
- English.
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In: Physical Review Letters. - 0031-9007. ; 122:22
- Related links:
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http://dx.doi.org/10... (free)
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https://doi.org/10.1...
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Abstract
Subject headings
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- We analyze the sensitivity of hadronic τ decays to nonstandard interactions within the model-independent framework of the standard model effective field theory. Both exclusive and inclusive decays are studied, using the latest lattice data and QCD dispersion relations. We show that there are enough theoretically clean channels to disentangle all the effective couplings contributing to these decays, with the τ→ππντ channel representing an unexpected powerful new physics probe. We find that the ratios of nonstandard couplings to the Fermi constant are bound at the subpercent level. These bounds are complementary to the ones from electroweak precision observables and pp→τντ measurements at the LHC. The combination of τ decay and LHC data puts tighter constraints on lepton universality violation in the gauge boson-lepton vertex corrections.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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