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A first search for same-sign WW production via double-parton scattering is performed based on proton-proton collision data at a center-of-mass energy of 8 TeV using dimuon and electron-muon final states. The search is based on the analysis of data corresponding to an integrated luminosity of 19.7 fb. No significant excess of events is observed above the expected single-parton scattering yields. A 95% confidence level upper limit of 0.32 pb is set on the inclusive cross section for same-sign WW production via the double-parton scattering process. This upper limit is used to place a 95% confidence level lower limit of 12.2 mb on the effective double-parton cross section parameter, closely related to the transverse distribution of partons in the proton. This limit on the effective cross section is consistent with previous measurements as well as with Monte Carlo event generator predictions.
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
Lesya Shchutska, Qian Wang, Matthias Wolf, Alexis Kalogeropoulos, Konstantin Androsov, Jan Steggemann, Yi Wang, Roberto Castello, Alessandro Degano, Michele Bianco, Jian Wang, Matthias Finger, Mingkui Wang, Zhirui Xu, Zheng Wang, Chao Wang, João Miguel das Neves Duarte, Tagir Aushev, Varun Sharma, Tian Cheng, Yixing Chen, Werner Lustermann, Ioannis Papadopoulos, Paolo Ronchese, Andrea Rizzi, Ekaterina Kuznetsova, Thomas Muller, Ho Ling Li, Giuseppe Codispoti, Hua Zhang, Siyuan Wang, Peter Hansen, Daniel Gonzalez, Ruchi Gupta, David Vannerom, Kun Shi, Wei Shi, Abhisek Datta, Ji Hyun Kim, Dipanwita Dutta, Donghyun Kim, 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, Wei Li, Vladimir Petrov, Francesco Fiori, Quentin Python, Hao Liu, Meng Xiao, Viktor Khristenko, Marco Trovato, Gurpreet Singh, Fan Xia, Bibhuprasad Mahakud, Kai Yi, Muhammad Waqas, Shuai Liu, Seungkyu Ha, Maren Tabea Meinhard, Davide Cieri, Zhen Liu, Jing Li, Ali Harb, Hui Wang, Benjamin William Allen, Pratyush Das, Xin Chen, Miao Hu, Wenjing Wu
Qian Wang, Lesya Shchutska, Matthias Wolf, Konstantin Androsov, Alexis Kalogeropoulos, Jan Steggemann, Yi Wang, Michele Bianco, Jian Wang, Matthias Finger, Mingkui Wang, Zhirui Xu, Zheng Wang, Chao Wang, João Miguel das Neves Duarte, Tagir Aushev, Varun Sharma, Tian Cheng, Yixing Chen, Werner Lustermann, Ioannis Papadopoulos, Paolo Ronchese, Andrea Rizzi, Ekaterina Kuznetsova, Thomas Muller, Ho Ling Li, Giuseppe Codispoti, Hua Zhang, Siyuan Wang, Peter Hansen, Daniel Gonzalez, Ruchi Gupta, David Vannerom, Kun Shi, Wei Shi, Abhisek Datta, Ji Hyun Kim, Dipanwita Dutta, Donghyun Kim, 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, Wei Li, Vladimir Petrov, Quentin Python, Hao Liu, Meng Xiao, Sourav Sen, Viktor Khristenko, Marco Trovato, Gurpreet Singh, Fan Xia, Bibhuprasad Mahakud, Shuai Liu, Muhammad Waqas, Seungkyu Ha, Davide Cieri, Maren Tabea Meinhard, Zhen Liu, Jing Li, Ali Harb, Hui Wang, Benjamin William Allen, Pratyush Das, Xin Chen, Miao Hu