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Test of lepton universality with Λ b 0 → pK − ℓ + ℓ − decays

Journal of High Energy Physics Springer 2020:5 (2020) 40

Authors:

R Aaij, C Abellán Beteta, T Ackernley, B Adeva, M Adinolfi, H Afsharnia, CA Aidala, S Aiola, Z Ajaltouni, S Akar, P Albicocco, J Albrecht, F Alessio, M Alexander, A Alfonso Albero, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, Y Amhis, L An, L Anderlini, G Andreassi, M Andreotti

Abstract:

The ratio of branching fractions of the decays Λb0 → pK−e+e− and Λb0 → pK−μ+μ−, RpK−1, is measured for the first time using proton-proton collision data corresponding to an integrated luminosity of 4.7 fb−1 recorded with the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV. In the dilepton mass-squared range 0.1 < q2< 6.0 GeV2/c4 and the pK− mass range m(pK−) < 2600 MeV/c2, the ratio of branching fractions is measured to be RpK−1=1.17−0.16+0.18±0.07, where the first uncertainty is statistical and the second systematic. This is the first test of lepton universality with b baryons and the first observation of the decay Λb0 → pK−e+e−.
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First measurements of χcJ→Σ-Σ¯+(J=0,1,2) decays

Physical Review D American Physical Society (APS) 101:9 (2020) 092002

Authors:

M Ablikim, MN Achasov, P Adlarson, S Ahmed, M Albrecht, A Amoroso, Q An, Anita, Y Bai, O Bakina, R Baldini Ferroli, I Balossino, Y Ban, K Begzsuren, JV Bennett, N Berger, M Bertani, D Bettoni, F Bianchi, J Biernat, J Bloms, A Bortone, I Boyko, RA Briere, H Cai, X Cai, A Calcaterra, GF Cao, N Cao, SA Cetin, JF Chang, WL Chang, G Chelkov, DY Chen, G Chen, HS Chen, ML Chen, SJ Chen, XR Chen, YB Chen, W Cheng, G Cibinetto, F Cossio, XF Cui, HL Dai, JP Dai, XC Dai, A Dbeyssi, RB de Boer, D Dedovich, ZY Deng, A Denig, I Denysenko, M Destefanis, F De Mori, Y Ding, C Dong, J Dong, LY Dong, MY Dong, SX Du, J Fang, SS Fang, Y Fang, R Farinelli, L Fava, F Feldbauer, G Felici, CQ Feng, M Fritsch, CD Fu, Y Fu, XL Gao, Y Gao, Y Gao, YG Gao, I Garzia, EM Gersabeck, A Gilman, K Goetzen, L Gong, WX Gong, W Gradl, M Greco, LM Gu, MH Gu, S Gu, YT Gu, CY Guan, AQ Guo, LB Guo, RP Guo, YP Guo, YP Guo, A Guskov, S Han, TT Han, TZ Han, XQ Hao, FA Harris, KL He, FH Heinsius, T Held, YK Heng, M Himmelreich, T Holtmann, YR Hou, ZL Hou, HM Hu, JF Hu, T Hu, Y Hu, GS Huang, LQ Huang, XT Huang, Z Huang, N Huesken, T Hussain, W Ikegami Andersson, W Imoehl, M Irshad, S Jaeger, S Janchiv, Q Ji, QP Ji, XB Ji, XL Ji, HB Jiang, XS Jiang, XY Jiang, JB Jiao, Z Jiao, S Jin, Y Jin, T Johansson, N Kalantar-Nayestanaki, XS Kang, R Kappert, M Kavatsyuk, BC Ke, IK Keshk, A Khoukaz, P Kiese, R Kiuchi, R Kliemt, L Koch, OB Kolcu, B Kopf, M Kuemmel, M Kuessner, A Kupsc, MG Kurth, W Kühn, JJ Lane, JS Lange, P Larin, L Lavezzi, H Leithoff, M Lellmann, T Lenz, C Li, CH Li, Cheng Li, DM Li, F Li, G Li, HB Li, HJ Li, JL Li, JQ Li, Ke Li, LK Li, Lei Li, PL Li, PR Li, SY Li, WD Li, WG Li, XH Li, XL Li, ZB Li, ZY Li, H Liang, H Liang, YF Liang, YT Liang, LZ Liao, J Libby, CX Lin, B Liu, BJ Liu, CX Liu, D Liu, DY Liu, FH Liu, Fang Liu, Feng Liu, HB Liu, HM Liu, Huanhuan Liu, Huihui Liu, JB Liu, JY Liu, K Liu, KY Liu, Ke Liu, L Liu, Q Liu, SB Liu, Shuai Liu, T Liu, X Liu, YB Liu, ZA Liu, ZQ Liu, YF Long, XC Lou, HJ Lu, JD Lu, JG Lu, XL Lu, Y Lu, YP Lu, CL Luo, MX Luo, PW Luo, T Luo, XL Luo, S Lusso, XR Lyu, F C., H L., L L., M M., Q M., R Q., R T., X N., X X., X Y., Y M., FE Maas, M Maggiora, S Maldaner, S Malde, QA Malik, A Mangoni, YJ Mao, ZP Mao, S Marcello, ZX Meng, JG Messchendorp, G Mezzadri, TJ Min, RE Mitchell, XH Mo, YJ Mo, N Yu Muchnoi, H Muramatsu, S Nakhoul, Y Nefedov, F Nerling, IB Nikolaev, Z Ning, S Nisar, SL Olsen, Q Ouyang, S Pacetti, X Pan, Y Pan, A Pathak, P Patteri, M Pelizaeus, HP Peng, K Peters, J Pettersson, JL Ping, RG Ping, A Pitka, R Poling, V Prasad, H Qi, HR Qi, M Qi, TY Qi, S Qian, W-B Qian, Z Qian, CF Qiao, LQ Qin, XP Qin, XS Qin, ZH Qin, JF Qiu, SQ Qu, KH Rashid, K Ravindran, CF Redmer, A Rivetti, V Rodin, M Rolo, G Rong, Ch Rosner, M Rump, A Sarantsev, M Savrié, Y Schelhaas, C Schnier, K Schoenning, DC Shan, W Shan, XY Shan, M Shao, CP Shen, PX Shen, XY Shen, HC Shi, RS Shi, X Shi, XD Shi, JJ Song, QQ Song, WM Song, YX Song, S Sosio, S Spataro, FF Sui, GX Sun, JF Sun, L Sun, SS Sun, T Sun, WY Sun, YJ Sun, YK Sun, YZ Sun, ZT Sun, YH Tan, YX Tan, CJ Tang, GY Tang, J Tang, V Thoren, B Tsednee, I Uman, B Wang, BL Wang, CW Wang, DY Wang, HP Wang, K Wang, LL Wang, M Wang, MZ Wang, Meng Wang, WH Wang, WP Wang, X Wang, XF Wang, XL Wang, Y Wang, Y Wang, YD Wang, YF Wang, YQ Wang, Z Wang, ZY Wang, Ziyi Wang, Zongyuan Wang, T Weber, DH Wei, P Weidenkaff, F Weidner, SP Wen, DJ White, U Wiedner, G Wilkinson, M Wolke, L Wollenberg, JF Wu, LH Wu, LJ Wu, X Wu, Z Wu, L Xia, H Xiao, SY Xiao, YJ Xiao, ZJ Xiao, XH Xie, YG Xie, YH Xie, TY Xing, XA Xiong, GF Xu, JJ Xu, QJ Xu, W Xu, XP Xu, L Yan, L Yan, WB Yan, WC Yan, Xu Yan, HJ Yang, HX Yang, L Yang, RX Yang, SL Yang, YH Yang, YX Yang, Yifan Yang, Zhi Yang, M Ye, MH Ye, JH Yin, ZY You, BX Yu, CX Yu, G Yu, JS Yu, T Yu, CZ Yuan, W Yuan, XQ Yuan, Y Yuan, ZY Yuan, CX Yue, A Yuncu, AA Zafar, Y Zeng, BX Zhang, Guangyi Zhang, HH Zhang, HY Zhang, JL Zhang, JQ Zhang, JW Zhang, JY Zhang, JZ Zhang, Jianyu Zhang, Jiawei Zhang, L Zhang, Lei Zhang, S Zhang, SF Zhang, TJ Zhang, XY Zhang, Y Zhang, YH Zhang, YT Zhang, Yan Zhang, Yao Zhang, Yi Zhang, ZH Zhang, ZY Zhang, G Zhao, J Zhao, JY Zhao, JZ Zhao, Lei Zhao, Ling Zhao, MG Zhao, Q Zhao, SJ Zhao, YB Zhao, YX Zhao Zhao, ZG Zhao, A Zhemchugov, B Zheng, JP Zheng, Y Zheng, YH Zheng, B Zhong, C Zhong, LP Zhou, Q Zhou, X Zhou, XK Zhou, XR Zhou, AN Zhu, J Zhu, K Zhu, KJ Zhu, SH Zhu, WJ Zhu, XL Zhu, YC Zhu, ZA Zhu, BS Zou, JH Zou
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Test-beam studies of a small-scale TORCH time-of-flight demonstrator

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Elsevier BV 961 (2020) 163671

Authors:

T Conneely, D Cussans, S Bhasin, T Blake, N Brook, EPM Gabriel, R Forty, C Frei, R Gao, T Hadavizadeh, TH Hancock, T Gershon, N Harnew, T Gys, D Piedigrossi, J Rademacker, J Milnes, M Kreps, M van Dijk
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Study of e + e − → D + D − π + π − at center-of-mass energies from 4.36 to 4.60GeV

Physics Letters B Elsevier 804 (2020) 135395

Authors:

BESIII Collaboration, M Ablikim, MN Achasov, P Adlarson, S Ahmed, M Albrecht, M Alekseev, A Amoroso, FF An, Q An, Y Bai, O Bakina, R Baldini Ferroli, I Balossino Balossino, Y Ban, K Begzsuren, JV Bennett, N Berger, M Bertani, D Bettoni, F Bianchi, J Biernat, J Bloms, I Boyko, RA Briere, H Cai, X Cai, A Calcaterra, GF Cao, N Cao, SA Cetin, J Chai, JF Chang, WL Chang, G Chelkov, DY Chen, G Chen, HS Chen, JC Chen, ML Chen, SJ Chen, YB Chen, W Cheng, G Cibinetto, F Cossio, XF Cui, HL Dai, JP Dai, XC Dai, A Dbeyssi, D Dedovich, ZY Deng, A Denig, I Denysenko, M Destefanis, F De Mori, Y Ding, C Dong, J Dong, LY Dong, MY Dong, ZL Dou, SX Du, JZ Fan, J Fang, SS Fang, Y Fang, R Farinelli, L Fava, F Feldbauer, G Felici, CQ Feng, M Fritsch, CD Fu, Y Fu, Q Gao, XL Gao, Y Gao, Y Gao, YG Gao, Z Gao, B Garillon, I Garzia, EM Gersabeck, A Gilman, K Goetzen, L Gong, WX Gong, W Gradl, M Greco, LM Gu, MH Gu, S Gu, YT Gu, AQ Guo, LB Guo, RP Guo, YP Guo, A Guskov, S Han, XQ Hao, FA Harris, KL He, FH Heinsius, T Held, YK Heng, M Himmelreich, YR Hou, ZL Hou, HM Hu, JF Hu, T Hu, Y Hu, GS Huang, JS Huang, XT Huang, XZ Huang, N Huesken, T Hussain, W Ikegami Andersson, W Imoehl, M Irshad, Q Ji, QP Ji, XB Ji, XL Ji, HL Jiang, XS Jiang, XY Jiang, JB Jiao, Z Jiao, DP Jin, S Jin, Y Jin, T Johansson, N Kalantar-Nayestanaki, XS Kang, R Kappert, M Kavatsyuk, BC Ke, IK Keshk, A Khoukaz, P Kiese, R Kiuchi, R Kliemt, L Koch, OB Kolcu, B Kopf, M Kuemmel, M Kuessner, A Kupsc, M Kurth, MG Kurth, W Kühn, JS Lange, P Larin, L Lavezzi, H Leithoff, T Lenz, C Li, Cheng Li, DM Li, F Li, FY Li, G Li, HB Li, HJ Li, JC Li, JW Li, Ke Li, LK Li, Lei Li, PL Li, PR Li, QY Li, WD Li, WG Li, XH Li, XL Li, XN Li, XQ Li, ZB Li, ZY Li, H Liang, H Liang, YF Liang, YT Liang, GR Liao, LZ Liao, J Libby, CX Lin, DX Lin, YJ Lin, B Liu, BJ Liu, CX Liu, D Liu, DY Liu, FH Liu, Fang Liu, Feng Liu, HB Liu, HM Liu, Huanhuan Liu, Huihui Liu, JB Liu, JY Liu, KY Liu, Ke Liu, LD Liu, LY Liu, Q Liu, SB Liu, T Liu, X Liu, XY Liu, YB Liu, ZA Liu, Zhiqing Liu, YF Long, XC Lou, HJ Lu, JD Lu, JG Lu, Y Lu, YP Lu, CL Luo, MX Luo, PW Luo, T Luo, XL Luo, S Lusso, XR Lyu, FC Ma, HL Ma, LL Ma, MM Ma, QM Ma, XN Ma, XX Ma, XY Ma, YM Ma, FE Maas, M Maggiora, S Maldaner, S Malde, QA Malik, A Mangoni, YJ Mao, ZP Mao, S Marcello, ZX Meng, JG Messchendorp, G Mezzadri, J Min, TJ Min, RE Mitchell, XH Mo, YJ Mo, C Morales Morales, N Yu Muchnoi, H Muramatsu, A Mustafa, S Nakhoul, Y Nefedov, F Nerling, IB Nikolaev, Z Ning, S Nisar, SL Niu, SL Olsen, Q Ouyang, S Pacetti, Y Pan, M Papenbrock, P Patteri, M Pelizaeus, HP Peng, K Peters, J Pettersson, JL Ping, RG Ping, A Pitka, R Poling, V Prasad, M Qi, TY Qi, S Qian, CF Qiao, N Qin, XP Qin, XS Qin, ZH Qin, JF Qiu, SQ Qu, KH Rashid, CF Redmer, M Richter, A Rivetti, V Rodin, M Rolo, G Rong, Ch Rosner, M Rump, A Sarantsev, M Savrié, K Schoenning, W Shan, XY Shan, M Shao, CP Shen, PX Shen, XY Shen, HY Sheng, X Shi, XD Shi, JJ Song, QQ Song, XY Song, S Sosio, C Sowa, S Spataro, FF Sui, GX Sun, JF Sun, L Sun, SS Sun, XH Sun, YJ Sun, YK Sun, YZ Sun, ZJ Sun, ZT Sun, YT Tan, CJ Tang, GY Tang, X Tang, V Thoren, B Tsednee, I Uman, B Wang, BL Wang, CW Wang, DY Wang, HH Wang, K Wang, LL Wang, LS Wang, M Wang, MZ Wang, Meng Wang, PL Wang, RM Wang, WP Wang, X Wang, XF Wang, XL Wang, Y Wang, Y Wang, YF Wang, Z Wang, ZG Wang, ZY Wang, Zongyuan Wang, T Weber, DH Wei, P Weidenkaff, HW Wen, SP Wen, U Wiedner, G Wilkinson, M Wolke, LH Wu, LJ Wu, Z Wu, L Xia, Y Xia, SY Xiao, YJ Xiao, ZJ Xiao, YG Xie, YH Xie, TY Xing, XA Xiong, QL Xiu, GF Xu, JJ Xu, L Xu, QJ Xu, W Xu, XP Xu, F Yan, L Yan, WB Yan, WC Yan, YH Yan, HJ Yang, HX Yang, L Yang, RX Yang, SL Yang, YH Yang, YX Yang, Yifan Yang, ZQ Yang, M Ye, MH Ye, JH Yin, ZY You, BX Yu, CX Yu, JS Yu, CZ Yuan, XQ Yuan, Y Yuan, A Yuncu, AA Zafar, Y Zeng, BX Zhang, BY Zhang, CC Zhang, DH Zhang, HH Zhang, HY Zhang, J Zhang, JL Zhang, JQ Zhang, JW Zhang, JY Zhang, JZ Zhang, K Zhang, L Zhang, SF Zhang, TJ Zhang, XY Zhang, Y Zhang, YH Zhang, YT Zhang, Yang Zhang, Yao Zhang, Yi Zhang, Yu Zhang, ZH Zhang, ZP Zhang, ZY Zhang, G Zhao, JW Zhao, JY Zhao, JZ Zhao, Lei Zhao, Ling Zhao, MG Zhao, Q Zhao, SJ Zhao, TC Zhao, YB Zhao, ZG Zhao, A Zhemchugov, B Zheng, JP Zheng, Y Zheng, YH Zheng, B Zhong, L Zhou, LP Zhou, Q Zhou, X Zhou, XK Zhou, XR Zhou, Xiaoyu Zhou, Xu Zhou, AN Zhu, J Zhu, J Zhu, K Zhu, KJ Zhu, SH Zhu, WJ Zhu, XL Zhu, YC Zhu, YS Zhu, ZA Zhu, J Zhuang, BS Zou, JH Zou
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Phase I Upgrade of the Readout System of the Vertex Detector at the LHCb Experiment

IEEE Transactions on Nuclear Science Institute of Electrical and Electronics Engineers (IEEE) 67:4 (2020) 732-739

Authors:

Antonio Fernandez Prieto, Pablo Vazquez Regueiro, Karol Hennessy, Jan Buytaert, Martin van Beuzekom, Edgar Lemos Cid, Lars Eklund, Kristof de Bruyn, Sneha Naik, Manuel Schiller, Donal Murray, Alexander Leflat, Oscar Boente Garcia, Abraham Gallas Torreira, Beatriz Garcia Plana, Themis Bowcock, Francesco Dettori, Karlis Dreimanis, Vinicius Franco Lima, David Hutchcroft, Kurt Rinnert, Tara Shears, Oscar Augusto, Victor Coco, Paula Collins, Tim Evans, Massi Ferro-Luzzi, Wolfgang Funk, Heinrich Schindler, Kazu Akiba, Elena Dall'Occo, Cristina Sanchez Graz, Wouter Hulsbergen, Daniel Hynds, Igor Kostiuk, Marcel Merk, Aleksandra Snoch, Dana Seman Bobulska, Silvia Borghi, Stefano de Capua, Deepanwita Dutta, Marco Gersabeck, Chris Parkes, Peter Svihra, Mark Williams, Galina Bogdanova, Vladimir Volkov, Pawel Kopciewicz, Maciej Majewski, Agnieszka Oblakowska-Mucha, Bartlomej Rachwal, Tomasz Szumlak, Lucas Meyer Garcia, Franciole Marinho, Larissa Helena Mendes, Irina Nasteva, Juan Otalora, Gabriel Rodrigues, Jaap Velthuis, Pawel Jalocha, Malcolm John, Nathan Jurik, Luke Scantlebury-Smead, John Back, Tim Gershon, Tom Latham, Andrew Morris
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