Êtes-vous un étudiant de l'EPFL à la recherche d'un projet de semestre?
Travaillez avec nous sur des projets en science des données et en visualisation, et déployez votre projet sous forme d'application sur GraphSearch.
Results are presented for an extraction of the top quark Yukawa coupling from top quark-antiquark (tt¯) kinematic distributions in the lepton plus jets final state in proton-proton collisions, based on data collected by the CMS experiment at the LHC at s=13 TeV, corresponding to an integrated luminosity of 35.8 fb-1. Corrections from weak boson exchange, including Higgs bosons, between the top quarks can produce large distortions of differential distributions near the energy threshold of tt¯ production. Therefore, precise measurements of these distributions are sensitive to the Yukawa coupling. Top quark events are reconstructed with at least three jets in the final state, and a novel technique is introduced to reconstruct the tt¯ system for events with one missing jet. This technique enhances the experimental sensitivity in the low invariant mass region, Mtt¯. The data yields in Mtt¯, the rapidity difference |yt-yt¯|, and the number of reconstructed jets are compared with distributions representing different Yukawa couplings. These comparisons are used to measure the ratio of the top quark Yukawa coupling to its standard model predicted value to be 1.07-0.43+0.34 with an upper limit of 1.67 at the 95% confidence level.
Qian Wang, Matthias Wolf, Yi Zhang, Konstantin Androsov, Alexis Kalogeropoulos, Jan Steggemann, Yi Wang, Michele Bianco, Jian Wang, Matthias Finger, Zheng Wang, Chao Wang, João Miguel das Neves Duarte, Tagir Aushev, Varun Sharma, Tian Cheng, Yixing Chen, Werner Lustermann, Ioannis Papadopoulos, Andrea Rizzi, Paolo Ronchese, Ekaterina Kuznetsova, Hua Zhang, Siyuan Wang, Jessica Prisciandaro, Peter Hansen, Ruchi Gupta, David Vannerom, Sebastiana Gianì, Kun Shi, Abhisek Datta, Arvind Shah, Wei Shi, Wei Sun, Jian Zhao, Rakesh Chawla, Thomas Berger, Federica Legger, Doohyun Kim, Bertrand François, Bandeep Singh, Ji Hyun Kim, Dipanwita Dutta, Donghyun Kim, Yiming Li, Sanjeev Kumar, Yong Yang, Ajay Kumar, Andromachi Tsirou, Georgios Anagnostou, Joao Varela, Csaba Hajdu, Muhammad Ahmad, Matthias Weber, Muhammad Shoaib, Milos Dordevic, Vineet Kumar, Abhishek Sharma, Vladimir Petrov, Francesco Fiori, Meng Xiao, Sourav Sen, Viktor Khristenko, Kai Yi, Muhammad Waqas, Seungkyu Ha, Maren Tabea Meinhard, Xiao Wang, Zhen Liu, Jing Li, Ali Harb, Hui Wang, Pratyush Das, Miao Hu, Anton Petrov, Chunhui Chen, Valérie Scheurer, Muhammad Ansar Iqbal
Qian Wang, Matthias Wolf, Yi Zhang, Konstantin Androsov, Alexis Kalogeropoulos, Jan Steggemann, Yi Wang, Michele Bianco, Jian Wang, Matthias Finger, Zheng Wang, Chao Wang, João Miguel das Neves Duarte, Tagir Aushev, Varun Sharma, Tian Cheng, Yixing Chen, Werner Lustermann, Ioannis Papadopoulos, Andrea Rizzi, Paolo Ronchese, Ekaterina Kuznetsova, Hua Zhang, Siyuan Wang, Jessica Prisciandaro, Peter Hansen, Ruchi Gupta, David Vannerom, Sebastiana Gianì, Kun Shi, Abhisek Datta, Arvind Shah, Wei Shi, Wei Sun, Jian Zhao, Rakesh Chawla, Thomas Berger, Federica Legger, Doohyun Kim, Bertrand François, Bandeep Singh, Ji Hyun Kim, Dipanwita Dutta, Donghyun Kim, Yiming Li, Sanjeev Kumar, Yong Yang, Ajay Kumar, Andromachi Tsirou, Georgios Anagnostou, Csaba Hajdu, Joao Varela, Muhammad Ahmad, Matthias Weber, Muhammad Shoaib, Milos Dordevic, Vineet Kumar, Abhishek Sharma, Vladimir Petrov, Francesco Fiori, Quentin Python, Meng Xiao, Sourav Sen, Viktor Khristenko, Fan Xia, Kai Yi, Muhammad Waqas, Seungkyu Ha, Maren Tabea Meinhard, Xiao Wang, Zhen Liu, Jing Li, Ali Harb, Hui Wang, Benjamin William Allen, Pratyush Das, Miao Hu, Anton Petrov, Chunhui Chen, Valérie Scheurer, Muhammad Ansar Iqbal
Qian Wang, Matthias Wolf, Yi Zhang, Konstantin Androsov, Alexis Kalogeropoulos, Jan Steggemann, Yi Wang, Michele Bianco, Jian Wang, Matthias Finger, Zheng Wang, Chao Wang, João Miguel das Neves Duarte, Tagir Aushev, Varun Sharma, Tian Cheng, Yixing Chen, Werner Lustermann, Ioannis Papadopoulos, Andrea Rizzi, Paolo Ronchese, Ekaterina Kuznetsova, Hua Zhang, Siyuan Wang, Jessica Prisciandaro, Peter Hansen, Ruchi Gupta, David Vannerom, Sebastiana Gianì, Kun Shi, Abhisek Datta, Arvind Shah, Wei Shi, Wei Sun, Jian Zhao, Rakesh Chawla, Thomas Berger, Federica Legger, Doohyun Kim, Bertrand François, Bandeep Singh, Ji Hyun Kim, Dipanwita Dutta, Donghyun Kim, Yiming Li, Sanjeev Kumar, Yong Yang, Ajay Kumar, Andromachi Tsirou, Georgios Anagnostou, Csaba Hajdu, Joao Varela, Muhammad Ahmad, Matthias Weber, Muhammad Shoaib, Milos Dordevic, Vineet Kumar, Abhishek Sharma, Vladimir Petrov, Francesco Fiori, Quentin Python, Meng Xiao, Sourav Sen, Viktor Khristenko, Fan Xia, Kai Yi, Muhammad Waqas, Seungkyu Ha, Maren Tabea Meinhard, Xiao Wang, Zhen Liu, Jing Li, Ali Harb, Hui Wang, Benjamin William Allen, Pratyush Das, Miao Hu, Anton Petrov, Chunhui Chen, Valérie Scheurer, Muhammad Ansar Iqbal