Measurement of the differential tt¯ production cross section as a function of the jet mass and extraction of the top quark mass in hadronic decays of boosted top quarks

. 2023 ; 83 (7) : 560. [epub] 20230703

Status PubMed-not-MEDLINE Jazyk angličtina Země Francie Médium print-electronic

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid37432714

A measurement of the jet mass distribution in hadronic decays of Lorentz-boosted top quarks is presented. The measurement is performed in the lepton + jets channel of top quark pair production (tt¯) events, where the lepton is an electron or muon. The products of the hadronic top quark decay are reconstructed using a single large-radius jet with transverse momentum greater than 400GeV. The data were collected with the CMS detector at the LHC in proton-proton collisions and correspond to an integrated luminosity of 138fb-1. The differential tt¯ production cross section as a function of the jet mass is unfolded to the particle level and is used to extract the top quark mass. The jet mass scale is calibrated using the hadronic W boson decay within the large-radius jet. The uncertainties in the modelling of the final state radiation are reduced by studying angular correlations in the jet substructure. These developments lead to a significant increase in precision, and a top quark mass of 173.06±0.84GeV.

1 Physikalisches Institut RWTH Aachen University Aachen Germany

3 Physikalisches Institut A RWTH Aachen University Aachen Germany

3 Physikalisches Institut B RWTH Aachen University Aachen Germany

Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt

Adiyaman University Adiyaman Turkey

AGH University of Science and Technology Faculty of Computer Science Electronics and Telecommunications Kraków Poland

Ain Shams University Cairo Egypt

Authors affiliated with an institute or an international laboratory covered by a cooperation agreement with CERN Geneva Switzerland

Baylor University Waco TX USA

Beihang University Beijing China

Benemerita Universidad Autonoma de Puebla Puebla Mexico

Bergische University Wuppertal Wuppertal Germany

Bethel University St Paul MN USA

Bhabha Atomic Research Centre Mumbai India

Bingol University Bingol Turkey

Bogazici University Istanbul Turkey

Boston University Boston MA USA

Bozok Universitetesi Rektörlügü Yozgat Turkey

Brandenburg University of Technology Cottbus Germany

British University in Egypt Cairo Egypt

Brown University Providence RI USA

Brunel University Uxbridge UK

Cairo University Cairo Egypt

California Institute of Technology Pasadena CA USA

Carnegie Mellon University Pittsburgh PA USA

Catholic University of America Washington DC USA

Center for High Energy Physics Fayoum University El Fayoum Egypt

Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil

Centro de Investigacion y de Estudios Avanzados del IPN Mexico City Mexico

Centro de Investigaciones Energéticas Medioambientales y Tecnológicas Madrid Spain

Centro Siciliano di Fisica Nucleare e di Struttura Della Materia Catania Italy

CERN European Organization for Nuclear Research Geneva Switzerland

Charles University Prague Czech Republic

Chonnam National University Institute for Universe and Elementary Particles Kwangju Korea

Chulalongkorn University Faculty of Science Department of Physics Bangkok Thailand

College of Engineering and Technology American University of the Middle East Dasman Kuwait

Consejo Nacional de Ciencia y Tecnología Mexico City Mexico

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Çukurova University Physics Department Science and Art Faculty Adana Turkey

Department of Applied Physics Faculty of Science and Technology Universiti Kebangsaan Malaysia Bangi Malaysia

Department of Physics Tsinghua University Beijing China

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Department of Physics University of Helsinki Helsinki Finland

Department of Physics University of Science and Technology of Mazandaran Behshahr Iran

Deutsches Elektronen Synchrotron Hamburg Germany

Ecole Polytechnique Fédérale Lausanne Lausanne Switzerland

Erciyes University Kayseri Turkey

Erzincan Binali Yildirim University Erzincan Turkey

Escuela Politecnica Nacional Quito Ecuador

ETH Zurich Institute for Particle Physics and Astrophysics Zurich Switzerland

Faculty of Informatics University of Debrecen Debrecen Hungary

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Institute of Experimental Physics Faculty of Physics University of Warsaw Warsaw Poland

Institute of High Energy Physics Beijing China

Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion beam Application Fudan University Shanghai China

Institute of Nuclear and Particle Physics NCSR Demokritos Aghia Paraskevi Greece

Institute of Nuclear Physics of the Uzbekistan Academy of Sciences Tashkent Uzbekistan

Institute of Nuclear Research ATOMKI Debrecen Hungary

Institute of Physics Bhubaneswar India

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institute or an international laboratory covered by a cooperation agreement with CERN Geneva Switzerland

Institute Rudjer Boskovic Zagreb Croatia

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IPPP Durham University Durham UK

IRFU CEA Université Paris Saclay Gif sur Yvette France

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