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Measurements of $$\psi (2S)$$ and $$\chi _{c1}(3872)$$ production within fully reconstructed jets

The European Physical Journal C SpringerOpen 85:5 (2025) 562

Authors:

R Aaij, ASW Abdelmotteleb, C Abellan Beteta, F Abudinén, T Ackernley, AA Adefisoye, B Adeva, M Adinolfi, P Adlarson, C Agapopoulou, CA Aidala, Z Ajaltouni, S Akar, K Akiba, P Albicocco, J Albrecht, F Alessio, M Alexander, Z Aliouche, P Alvarez Cartelle, R Amalric, S Amato, JL Amey, Y Amhis, L An, L Anderlini, M Andersson, A Andreianov, P Andreola, M Andreotti, D Andreou, A Anelli, D Ao, F Archilli, M Argenton, S Arguedas Cuendis, A Artamonov, M Artuso, E Aslanides, R Ataíde Da Silva, M Atzeni, B Audurier, D Bacher, I Bachiller Perea, S Bachmann, M Bachmayer, JJ Back, P Baladron Rodriguez, V Balagura, W Baldini

Abstract:

This paper presents the first measurement of ψ(2S) and χc1(3872) meson production within fully reconstructed jets. Each quarkonium state (tag) is reconstructed via its decay to the J/ψ(→μ+μ−)π+π− final state in the forward region using proton-proton collision data collected by the LHCb experiment at the center-of-mass-energy of 13TeV in 2016, corresponding to an integrated luminosity of 1.64 fb−1. The fragmentation function, presented as the ratio of the quarkonium-tag transverse momentum to the full jet transverse momentum (pT(tag)/pT(jet)), is measured differentially in pT(jet) and pT(tag) bins. The distributions are separated into promptly produced quarkonia from protonproton collisions and quarkonia produced from displaced b-hadron decays. While the displaced quarkonia fragmentation functions are in general well described by parton-shower predictions, the prompt quarkonium distributions differ significantly from fixed-order non-relativistic QCD (NRQCD) predictions followed by a QCD parton showe
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Observation of an Axial-Vector State in the Study of the Decay ψ(3686)→ϕηη′

Physical Review Letters 134:19 (2025) 191901

Authors:

M Ablikim, MN Achasov, P Adlarson, O Afedulidis, XC Ai, R Aliberti, A Amoroso, Q An, Y Bai, O Bakina, I Balossino, Y Ban, H-R Bao, V Batozskaya, K Begzsuren, N Berger, M Berlowski, M Bertani, D Bettoni, F Bianchi, E Bianco, A Bortone, I Boyko, RA Briere, A Brueggemann, H Cai, X Cai, A Calcaterra, GF Cao, N Cao, SA Cetin, JF Chang, WL Chang, G R., G Chelkov, C Chen, CH Chen, Chao Chen, G Chen, HS Chen, ML Chen, SJ Chen, SL Chen, SM Chen, T Chen, XR Chen, XT Chen, YB Chen, YQ Chen, ZJ Chen, ZY Chen, SK Choi, X Chu, G Cibinetto, F Cossio, JJ Cui, HL Dai, JP Dai, A Dbeyssi, RE de Boer, D Dedovich, CQ Deng, ZY Deng, A Denig, I Denysenko, M Destefanis, F De Mori, B Ding, XX Ding, Y Ding, Y Ding, J Dong, LY Dong, MY Dong, X Dong, MC Du, SX Du, ZH Duan, P Egorov, YH Fan, J Fang, J Fang, SS Fang, WX Fang, Y Fang, YQ Fang, R Farinelli, L Fava, F Feldbauer, G Felici, CQ Feng, JH Feng, YT Feng, K Fischer, M Fritsch, CD Fu, JL Fu, YW Fu, H Gao, YN Gao, Yang Gao, S Garbolino, I Garzia, L Ge, PT Ge, ZW Ge, C Geng, EM Gersabeck, A Gilman, K Goetzen, L Gong, WX Gong, W Gradl, S Gramigna, M Greco, MH Gu, YT Gu, CY Guan, ZL Guan, AQ Guo, LB Guo, MJ Guo, RP Guo, YP Guo, A Guskov, J Gutierrez, KL Han, TT Han, XQ Hao, FA Harris, KK He, KL He, FH Heinsius, CH Heinz, YK Heng, C Herold, T Holtmann, PC Hong, GY Hou, XT Hou, YR Hou, ZL Hou, BY Hu, HM Hu, JF Hu, T Hu, Y Hu, GS Huang, KX Huang, LQ Huang, XT Huang, YP Huang, T Hussain, F Hölzken, N Hüsken, N in der Wiesche, M Irshad, J Jackson, S Janchiv, JH Jeong, Q Ji, QP Ji, W Ji, XB Ji, XL Ji, YY Ji, XQ Jia, ZK Jia, D Jiang, HB Jiang, PC Jiang, SS Jiang, TJ Jiang, XS Jiang, Y Jiang, JB Jiao, JK Jiao, Z Jiao, S Jin, Y Jin, MQ Jing, XM Jing, T Johansson, S Kabana, N Kalantar-Nayestanaki, XL Kang, XS Kang, M Kavatsyuk, BC Ke, V Khachatryan, A Khoukaz, R Kiuchi, OB Kolcu, B Kopf, M Kuessner, X Kui, N Kumar, A Kupsc, W Kühn, JJ Lane, P Larin, L Lavezzi, TT Lei, ZH Lei, H Leithoff, M Lellmann, T Lenz, C Li, C Li, CH Li, Cheng Li, DM Li, F Li, G Li, H Li, HB Li, HJ Li, HN Li, Hui Li, JR Li, JS Li, Ke Li, LJ Li, LK Li, Lei Li, MH Li, PR Li, QM Li, QX Li, R Li, SX Li, T Li, WD Li, WG Li, X Li, XH Li, XL Li, Xiaoyu Li, YG Li, ZJ Li, ZX Li, C Liang, H Liang, H Liang, YF Liang, YT Liang, GR Liao, LZ Liao, YP Liao, J Libby, A Limphirat, DX Lin, T Lin, BJ Liu, BX Liu, C Liu, CX Liu, FH Liu, Fang Liu, Feng Liu, GM Liu, H Liu, HB Liu, HM Liu, Huanhuan Liu, Huihui Liu, JB Liu, JY Liu, K Liu, KY Liu, Ke Liu, L Liu, LC Liu, Lu Liu, MH Liu, PL Liu, Q Liu, SB Liu, T Liu, WK Liu, WM Liu, X Liu, X Liu, Y Liu, Y Liu, YB Liu, ZA Liu, ZD Liu, ZQ Liu, XC Lou, FX Lu, HJ Lu, JG Lu, XL Lu, Y Lu, YP Lu, ZH Lu, CL Luo, MX Luo, T Luo, XL Luo, XR Lyu, YF Lyu, F C., H Ma, H L., J L., L L., M M., Q M., R Q., X T., X Y., Y Ma, Y M., FE Maas, M Maggiora, S Malde, A Mangoni, YJ Mao, ZP Mao, S Marcello, ZX Meng, JG Messchendorp, G Mezzadri, H Miao, TJ Min, RE Mitchell, XH Mo, B Moses, N Yu Muchnoi, J Muskalla, Y Nefedov, F Nerling, IB Nikolaev, Z Ning, S Nisar, QL Niu, WD Niu, Y Niu, SL Olsen, Q Ouyang, S Pacetti, X Pan, Y Pan, A Pathak, P Patteri, YP Pei, M Pelizaeus, HP Peng, YY Peng, K Peters, JL Ping, RG Ping, S Plura, V Prasad, FZ Qi, H Qi, HR Qi, M Qi, TY Qi, S Qian, WB Qian, CF Qiao, XK Qiao, JJ Qin, LQ Qin, XS Qin, ZH Qin, JF Qiu, SQ Qu, ZH Qu, CF Redmer, KJ Ren, A Rivetti, M Rolo, G Rong, Ch Rosner, SN Ruan, N Salone, A Sarantsev, Y Schelhaas, K Schoenning, M Scodeggio, KY Shan, W Shan, XY Shan, ZJ Shang, JF Shangguan, LG Shao, M Shao, CP Shen, HF Shen, WH Shen, XY Shen, BA Shi, HC Shi, JL Shi, JY Shi, QQ Shi, RS Shi, SY Shi, X Shi, JJ Song, TZ Song, WM Song, YJ Song, YX Song, S Sosio, S Spataro, F Stieler, YJ Su, GB Sun, GX Sun, H Sun, HK Sun, JF Sun, K Sun, L Sun, SS Sun, T Sun, WY Sun, Y Sun, YJ Sun, YZ Sun, ZQ Sun, ZT Sun, CJ Tang, GY Tang, J Tang, YA Tang, LY Tao, QT Tao, M Tat, JX Teng, V Thoren, WH Tian, Y Tian, ZF Tian, I Uman, Y Wan, SJ Wang, B Wang, BL Wang, Bo Wang, DY Wang, F Wang, HJ Wang, JP Wang, K Wang, LL Wang, M Wang, Meng Wang, NY Wang, S Wang, S Wang, T Wang, TJ Wang, W Wang, W Wang, WP Wang, X Wang, XF Wang, XJ Wang, XL Wang, XN Wang, Y Wang, YD Wang, YF Wang, YL Wang, YN Wang, YQ Wang, Yaqian Wang, Yi Wang, Z Wang, ZL Wang, ZY Wang, Ziyi Wang, D Wei, DH Wei, F Weidner, SP Wen, YR Wen, U Wiedner, G Wilkinson, M Wolke, L Wollenberg, C Wu, JF Wu, LH Wu, LJ Wu, X Wu, XH Wu, Y Wu, YH Wu, YJ Wu, Z Wu, L Xia, XM Xian, BH Xiang, T Xiang, D Xiao, GY Xiao, SY Xiao, YL Xiao, ZJ Xiao, C Xie, XH Xie, Y Xie, YG Xie, YH Xie, ZP Xie, TY Xing, CF Xu, CJ Xu, GF Xu, HY Xu, QJ Xu, QN Xu, W Xu, WL Xu, XP Xu, YC Xu, ZP Xu, ZS Xu, F Yan, L Yan, WB Yan, WC Yan, XQ Yan, HJ Yang, HL Yang, HX Yang, Tao Yang, Y Yang, YF Yang, YX Yang, Yifan Yang, ZW Yang, ZP Yao, M Ye, MH Ye, JH Yin, ZY You, BX Yu, CX Yu, G Yu, JS Yu, T Yu, XD Yu, YC Yu, CZ Yuan, J Yuan, L Yuan, SC Yuan, Y Yuan, ZY Yuan, CX Yue, AA Zafar, FR Zeng, SH Zeng, X Zeng, Y Zeng, YJ Zeng, YJ Zeng, XY Zhai, YC Zhai, YH Zhan, AQ Zhang, BL Zhang, BX Zhang, DH Zhang, GY Zhang, H Zhang, HC Zhang, HH Zhang, HH Zhang, HQ Zhang, HY Zhang, J Zhang, J Zhang, JJ Zhang, JL Zhang, JQ Zhang, JW Zhang, JX Zhang, JY Zhang, JZ Zhang, Jianyu Zhang, LM Zhang, Lei Zhang, P Zhang, QY Zhang, RY Zhang, Shuihan Zhang, Shulei Zhang, XD Zhang, XM Zhang, XY Zhang, Y Zhang, YT Zhang, YH Zhang, YM Zhang, Yan Zhang, Yao Zhang, ZD Zhang, ZH Zhang, ZL Zhang, ZY Zhang, ZY Zhang, G Zhao, JY Zhao, JZ Zhao, Lei Zhao, Ling Zhao, MG Zhao, RP Zhao, SJ Zhao, YB Zhao, YX Zhao, ZG Zhao, A Zhemchugov, B Zheng, JP Zheng, WJ Zheng, YH Zheng, B Zhong, X Zhong, H Zhou, JY Zhou, LP Zhou, X Zhou, XK Zhou, XR Zhou, XY Zhou, YZ Zhou, J Zhu, K Zhu, KJ Zhu, L Zhu, LX Zhu, SH Zhu, SQ Zhu, TJ Zhu, WJ Zhu, YC Zhu, ZA Zhu, JH Zou, J Zu
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Search for e + e − → K S 0 K S 0 h c

Journal of High Energy Physics Springer 2025:5 (2025) 144

Authors:

M Ablikim, MN Achasov, P Adlarson, O Afedulidis, XC Ai, R Aliberti, A Amoroso, Q An, Y Bai, O Bakina, I Balossino, Y Ban, H-R Bao, V Batozskaya, K Begzsuren, N Berger, M Berlowski, M Bertani, D Bettoni, F Bianchi, E Bianco, A Bortone, I Boyko, RA Briere

Abstract:

Using e+e− collision data at 13 center-of-mass energies ranging from 4.600 to 4.951 GeV collected with the BESIII detector, we conduct the first search for the e+e− → KS0KS0hc process and investigate the resonance structures in the cross section line shape. No significant signal is observed, and the upper limits of the Born cross sections at each center-of-mass energy are presented. The ratio σe+e−→KS0KS0hcσe+e−→KS0KS0J/ψ is determined to be 0.15 ± 0.22. This result indicates that if vector states exist in this energy region, their decay into hc is significantly suppressed compared to decays into J/ψ.
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Observation of the Charmonium Decay ηc→γγ in J/ψ→γηc

Physical Review Letters American Physical Society (APS) 134:18 (2025) 181901

Authors:

M Ablikim, MN Achasov, P Adlarson, XC Ai, R Aliberti, A Amoroso, Q An, Y Bai, O Bakina, Y Ban, H-R Bao, V Batozskaya, K Begzsuren, N Berger, M Berlowski, M Bertani, D Bettoni, F Bianchi, E Bianco, A Bortone, I Boyko, RA Briere, A Brueggemann, H Cai, MH Cai, X Cai, A Calcaterra, GF Cao, N Cao, SA Cetin, XY Chai, JF Chang, G R., Y Z., G Chelkov, C Chen, CH Chen, Chao Chen, G Chen, HS Chen, HY Chen, ML Chen, SJ Chen, SL Chen, SM Chen, T Chen, XR Chen, XT Chen, YB Chen, YQ Chen, ZJ Chen, SK Choi, X Chu, G Cibinetto, F Cossio, JJ Cui, HL Dai, JP Dai, A Dbeyssi, RE de Boer, D Dedovich, CQ Deng, ZY Deng, A Denig, I Denysenko, M Destefanis, F De Mori, B Ding, XX Ding, Y Ding, Y Ding, YX Ding, J Dong, LY Dong, MY Dong, X Dong, MC Du, SX Du, YY Duan, ZH Duan, P Egorov, GF Fan, JJ Fan, YH Fan, J Fang, J Fang, SS Fang, WX Fang, YQ Fang, R Farinelli, L Fava, F Feldbauer, G Felici, CQ Feng, JH Feng, YT Feng, M Fritsch, CD Fu, JL Fu, YW Fu, H Gao, XB Gao, YN Gao, YN Gao, YY Gao, Yang Gao, S Garbolino, I Garzia, PT Ge, ZW Ge, C Geng, EM Gersabeck, A Gilman, K Goetzen, L Gong, WX Gong, W Gradl, S Gramigna, M Greco, MH Gu, YT Gu, CY Guan, AQ Guo, LB Guo, MJ Guo, RP Guo, YP Guo, A Guskov, J Gutierrez, KL Han, TT Han, F Hanisch, XQ Hao, FA Harris, KK He, KL He, FH Heinsius, CH Heinz, YK Heng, C Herold, T Holtmann, PC Hong, GY Hou, XT Hou, YR Hou, ZL Hou, BY Hu, HM Hu, JF Hu, QP Hu, SL Hu, T Hu, Y Hu, GS Huang, KX Huang, LQ Huang, P Huang, XT Huang, YP Huang, YS Huang, T Hussain, N Hüsken, N in der Wiesche, J Jackson, S Janchiv, Q Ji, QP Ji, W Ji, XB Ji, XL Ji, YY Ji, ZK Jia, D Jiang, HB Jiang, PC Jiang, SJ Jiang, TJ Jiang, XS Jiang, Y Jiang, JB Jiao, JK Jiao, Z Jiao, S Jin, Y Jin, MQ Jing, XM Jing, T Johansson, S Kabana, N Kalantar-Nayestanaki, XL Kang, XS Kang, M Kavatsyuk, BC Ke, V Khachatryan, A Khoukaz, R Kiuchi, OB Kolcu, B Kopf, M Kuessner, X Kui, N Kumar, A Kupsc, W Kühn, Q Lan, WN Lan, TT Lei, ZH Lei, M Lellmann, T Lenz, C Li, C Li, CH Li, CK Li, Cheng Li, DM Li, F Li, G Li, HB Li, HJ Li, HN Li, Hui Li, JR Li, JS Li, K Li, KL Li, KL Li, LJ Li, Lei Li, MH Li, MR Li, PL Li, PR Li, QM Li, QX Li, R Li, T Li, TY Li, WD Li, WG Li, X Li, XH Li, XL Li, XY Li, XZ Li, Y Li, YG Li, ZJ Li, ZY Li, C Liang, H Liang, YF Liang, YT Liang, GR Liao, YP Liao, J Libby, A Limphirat, CC Lin, CX Lin, DX Lin, LQ Lin, T Lin, BJ Liu, BX Liu, C Liu, CX Liu, F Liu, FH Liu, Feng Liu, GM Liu, H Liu, HB Liu, HH Liu, HM Liu, Huihui Liu, JB Liu, JJ Liu, K Liu, K Liu, KY Liu, Ke Liu, L Liu, LC Liu, Lu Liu, MH Liu, PL Liu, Q Liu, SB Liu, T Liu, WK Liu, WM Liu, WT Liu, X Liu, X Liu, XY Liu, Y Liu, Y Liu, Y Liu, YB Liu, ZA Liu, ZD Liu, ZQ Liu, XC Lou, FX Lu, HJ Lu, JG Lu, Y Lu, YH Lu, YP Lu, ZH Lu, CL Luo, JR Luo, JS Luo, MX Luo, T Luo, XL Luo, XR Lyu, YF Lyu, YH Lyu, F C., H Ma, H L., J L., L L., L R., Q M., R Q., R Y., T Ma, X T., X Y., Y M., FE Maas, I MacKay, M Maggiora, S Malde, YJ Mao, ZP Mao, S Marcello, YH Meng, ZX Meng, JG Messchendorp, G Mezzadri, H Miao, TJ Min, RE Mitchell, XH Mo, B Moses, N Yu Muchnoi, J Muskalla, Y Nefedov, F Nerling, LS Nie, IB Nikolaev, Z Ning, S Nisar, QL Niu, SL Olsen, Q Ouyang, S Pacetti, X Pan, Y Pan, A Pathak, YP Pei, M Pelizaeus, HP Peng, YY Peng, K Peters, JL Ping, RG Ping, S Plura, V Prasad, FZ Qi, HR Qi, M Qi, S Qian, WB Qian, CF Qiao, JH Qiao, JJ Qin, LQ Qin, LY Qin, PB Qin, XP Qin, XS Qin, ZH Qin, JF Qiu, ZH Qu, CF Redmer, A Rivetti, M Rolo, G Rong, SS Rong, Ch Rosner, MQ Ruan, SN Ruan, N Salone, A Sarantsev, Y Schelhaas, K Schoenning, M Scodeggio, KY Shan, W Shan, XY Shan, ZJ Shang, JF Shangguan, LG Shao, M Shao, CP Shen, HF Shen, WH Shen, XY Shen, BA Shi, H Shi, JL Shi, JY Shi, SY Shi, X Shi, JJ Song, TZ Song, WM Song, YJ Song, YX Song, S Sosio, S Spataro, F Stieler, SS Su, YJ Su, GB Sun, GX Sun, H Sun, HK Sun, JF Sun, K Sun, L Sun, SS Sun, T Sun, YC Sun, YH Sun, YJ Sun, YZ Sun, ZQ Sun, ZT Sun, CJ Tang, GY Tang, J Tang, LF Tang, M Tang, YA Tang, LY Tao, M Tat, JX Teng, V Thoren, WH Tian, Y Tian, ZF Tian, I Uman, B Wang, Bo Wang, C Wang, DY Wang, HJ Wang, JJ Wang, K Wang, LL Wang, LW Wang, M Wang, NY Wang, S Wang, S Wang, T Wang, TJ Wang, W Wang, W Wang, WP Wang, X Wang, XF Wang, XJ Wang, XL Wang, XN Wang, Y Wang, YD Wang, YF Wang, YH Wang, YL Wang, YN Wang, YQ Wang, Yaqian Wang, Yi Wang, Z Wang, ZL Wang, ZY Wang, DH Wei, F Weidner, SP Wen, YR Wen, U Wiedner, G Wilkinson, M Wolke, C Wu, JF Wu, LH Wu, LJ Wu, Lianjie Wu, SG Wu, SM Wu, X Wu, XH Wu, YJ Wu, Z Wu, L Xia, XM Xian, BH Xiang, T Xiang, D Xiao, GY Xiao, H Xiao, YL Xiao, ZJ Xiao, C Xie, KJ Xie, XH Xie, Y Xie, YG Xie, YH Xie, ZP Xie, TY Xing, CF Xu, CJ Xu, GF Xu, M Xu, QJ Xu, QN Xu, WL Xu, XP Xu, Y Xu, YC Xu, ZS Xu, F Yan, HY Yan, L Yan, WB Yan, WC Yan, WP Yan, XQ Yan, HJ Yang, HL Yang, HX Yang, JH Yang, RJ Yang, T Yang, Y Yang, YF Yang, YQ Yang, YX Yang, YZ Yang, M Ye, MH Ye, Junhao Yin, ZY You, BX Yu, CX Yu, G Yu, JS Yu, MC Yu, T Yu, XD Yu, YC Yu, CZ Yuan, H Yuan, J Yuan, J Yuan, L Yuan, SC Yuan, Y Yuan, ZY Yuan, CX Yue, Ying Yue, AA Zafar, SH Zeng, X Zeng, Y Zeng, YJ Zeng, YJ Zeng, XY Zhai, YH Zhan, AQ Zhang, BL Zhang, BX Zhang, DH Zhang, GY Zhang, GY Zhang, H Zhang, H Zhang, HC Zhang, HH Zhang, HQ Zhang, HR Zhang, HY Zhang, J Zhang, J Zhang, JJ Zhang, JL Zhang, JQ Zhang, JS Zhang, JW Zhang, JX Zhang, JY Zhang, JZ Zhang, Jianyu Zhang, LM Zhang, Lei Zhang, N Zhang, P Zhang, Q Zhang, QY Zhang, RY Zhang, SH Zhang, Shulei Zhang, XM Zhang, XY Zhang, XY Zhang, Y Zhang, Y Zhang, YT Zhang, YH Zhang, YM Zhang, Yan Zhang, ZD Zhang, ZH Zhang, ZL Zhang, ZX Zhang, ZY Zhang, ZY Zhang, ZZ Zhang, Zh Zh Zhang, G Zhao, JY Zhao, JZ Zhao, L Zhao, Lei Zhao, MG Zhao, N Zhao, RP Zhao, SJ Zhao, YB Zhao, YX Zhao, ZG Zhao, A Zhemchugov, B Zheng, BM Zheng, JP Zheng, WJ Zheng, XR Zheng, YH Zheng, B Zhong, X Zhong, H Zhou, JY Zhou, S Zhou, X Zhou, XK Zhou, XR Zhou, XY Zhou, YZ Zhou, ZC Zhou, AN Zhu, J Zhu, K Zhu, KJ Zhu, KS Zhu, L Zhu, LX Zhu, SH Zhu, TJ Zhu, WD Zhu, WJ Zhu, WZ Zhu, YC Zhu, ZA Zhu, XY Zhuang, JH Zou, J Zu
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Search for K S 0 invisible decays

Journal of High Energy Physics Springer 2025:5 (2025) 92

Authors:

M Ablikim, MN Achasov, P Adlarson, O Afedulidis, XC Ai, R Aliberti, A Amoroso, Q An, Y Bai, O Bakina, I Balossino, Y Ban, H-R Bao, V Batozskaya, K Begzsuren, N Berger, M Berlowski, M Bertani, D Bettoni, F Bianchi, E Bianco, A Bortone, I Boyko, RA Briere

Abstract:

Based on (1.0087 ± 0.0044) × 1010J/ψ events collected with the BESIII detector at the BEPCII e+e− storage ring, we search for KS0 invisible decays via the J/ψ →ϕKS0KS0 process. No significant signal is observed, and the upper limit of the branching fraction of these invisible decays is set at 8.4 × 10−4 at the 90% confidence level. This is the first experimental search for KS0 invisible decays.
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