A measurement of the high-mass ττ¯ production cross-section at s=13 TeV with the ATLAS detector and constraints on new particles and couplings
Journal of High Energy Physics, cilt.2025, sa.10, 2025 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 2025 Sayı: 10
- Basım Tarihi: 2025
- Doi Numarası: 10.1007/jhep10(2025)054
- Dergi Adı: Journal of High Energy Physics
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, INSPEC, MathSciNet, zbMATH, Directory of Open Access Journals, Nature Index
- Anahtar Kelimeler: Beyond Standard Model, Hadron-Hadron Scattering
- İstanbul Üniversitesi Adresli: Evet
Özet
The production cross-section of high-mass τ-lepton pairs is measured as a function of the dilepton visible invariant mass, using 140 fb−1 of s=13 TeV proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider. The measurement agrees with the predictions of the Standard Model. A fit to the invariant mass distribution is performed as a function of b-jet multiplicity, to constrain the non-resonant production of new particles described by an effective field theory or in models containing leptoquarks or Z′ bosons that couple preferentially to third-generation fermions. The constraints on new particles improve on previous results, and the constraints on effective operators include those affecting the anomalous magnetic moment of the τ-lepton.