Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 51: BSM physics (theory)

T 51.4: Vortrag

Mittwoch, 17. März 2021, 16:45–17:00, Ta

Towards constraining triple gluon operators through tops — •Prasham Jain¹, Debjyoti Bardhan², Diptimoy Ghosh³, and Arun Thalapillil⁴ — ¹Albert-Ludwigs-Universität Freiburg, Physikalisches Institut, Hermann-Herder-Straße 3, D-79104 Freiburg, Germany — ²Department of Physics, Ben-Gurion University of the Negev, Beer Sheva 8410501, Israel — ³Indian Institute of Science Education and Research, Homi Bhabha road, Pashan, Pune 411008, India — ⁴Indian Institute of Science Education and Research, Homi Bhabha road, Pashan, Pune 411008, India

Effective field theory techniques provide important tools to probe for physics beyond the Standard Model in a relatively model-independent way. In this talk, the CP-even dimension-6 purely gluonic operator is revisited to investigate the possible constraints on it by studying its effect on top-pair production at the LHC, in particular the high p_T and m_tt tails of the distribution. Cut-based analysis reveals that the scale of New Physics when this operator alone contributes to the production process is greater than 3.6 TeV at 95% C.L., which is a much stronger bound compared to the bound of 850 GeV obtained from Run-I data using the same channel. This is reinforced by an analysis using Machine Learning techniques. This study complements similar studies that have focussed on other collider channels to study this operator.