Observation of X(2370) and search for X(2120) in J/ψ→γKK¯η
Using a sample of 1.31×109J/ψ events collected with the BESIII detector, we perform a study of J/ψ→γKK¯η′. X(2370) is observed in the KK¯η′ invariant-mass distribution with a statistical significance of 8.3σ. Its resonance parameters are measured to be M=2341.6±6.5(stat.)±5.7(syst.)MeV/c2 and Γ=117±...
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| Veröffentlicht in: | The European physical journal. C, Particles and fields Particles and fields, 2020-08, Vol.80 (8) |
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| creator | Anita Bettoni, D Bloms, J Cetin, S A Chang, W L Chen, G Denig, A De, Mori F Dong, M Y Farinelli, R Gao, X L Gao, Y Goetzen, K Gong, L Greco, M Gu, M H Guo, A Q Guo, Y P Guskov, A He, K L Huang, X Z Jin, D P Kappert, R Keshk, I K Kuessner, M Kühn, W Li, D M Li F Li G Li, J C Liao, L Z Liu, B J Liu, D Liu, F H Liu Huanhuan Liu, J B Liu, L Y Liu, Q Liu, X Y Lu, H J Lu, J D Lusso, S Ma, H L Ma, L L Maldaner, S Malde, S Mangoni, A Marcello, S Mezzadri, G Min, J Nakhoul, S Nefedov, Y Papenbrock, M Qi M Qian, S Qin, X S Qiu, J F Qu, S Q Ravindran, K Rolo, M Rosner Ch Shao, M Shen, P X Sheng, H Y Sosio, S Sui, F F Tan, Y X Wang, B L Wang, L S Wang, P L Wang, Y D Wang, Y F Wiedner, U Xiao, S Y Xiao, Y J Xiao, Z J Xie, Y H Xu, Q J Xu W Yang, H J Yang, R X Yu, B X Yu, C X Yu, J S Yuan, X Q Zeng, Y Zhang, C C Zhang, J Zhang, J Y Zhang, J Z Zhang, T J Zhang, X Y Zhang, Yan Zhang, Yao Zhao, Ling Zhao, M G Zhou, L P Zhou, X Zhu, X L Zhuang, J |
| description | Using a sample of 1.31×109J/ψ events collected with the BESIII detector, we perform a study of J/ψ→γKK¯η′. X(2370) is observed in the KK¯η′ invariant-mass distribution with a statistical significance of 8.3σ. Its resonance parameters are measured to be M=2341.6±6.5(stat.)±5.7(syst.)MeV/c2 and Γ=117±10(stat.)±8(syst.)MeV. The product branching fractions for J/ψ→γX(2370),X(2370)→K+K-η′ and J/ψ→γX(2370),X(2370)→KS0KS0η′ are determined to be (1.79±0.23(stat.)±0.65(syst.))×10-5 and (1.18±0.32(stat.)±0.39(syst.))×10-5, respectively. No evident signal for X(2120) is observed in the KK¯η′ invariant-mass distribution. The upper limits for the product branching fractions of B(J/ψ→γX(2120)→γK+K-η′) and B(J/ψ→γX(2120)→γKS0KS0η′) are determined to be 1.49×10-5 and 6.38×10-6 at the 90% confidence level, respectively. |
| doi_str_mv | 10.1140/epjc/s10052-020-8078-4 |
| format | Article |
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X(2370) is observed in the KK¯η′ invariant-mass distribution with a statistical significance of 8.3σ. Its resonance parameters are measured to be M=2341.6±6.5(stat.)±5.7(syst.)MeV/c2 and Γ=117±10(stat.)±8(syst.)MeV. The product branching fractions for J/ψ→γX(2370),X(2370)→K+K-η′ and J/ψ→γX(2370),X(2370)→KS0KS0η′ are determined to be (1.79±0.23(stat.)±0.65(syst.))×10-5 and (1.18±0.32(stat.)±0.39(syst.))×10-5, respectively. No evident signal for X(2120) is observed in the KK¯η′ invariant-mass distribution. The upper limits for the product branching fractions of B(J/ψ→γX(2120)→γK+K-η′) and B(J/ψ→γX(2120)→γKS0KS0η′) are determined to be 1.49×10-5 and 6.38×10-6 at the 90% confidence level, respectively.</description><identifier>ISSN: 1434-6044</identifier><identifier>EISSN: 1434-6052</identifier><identifier>DOI: 10.1140/epjc/s10052-020-8078-4</identifier><language>eng</language><publisher>Heidelberg: Springer Nature B.V</publisher><subject>Confidence intervals ; Invariants ; Mass distribution ; Statistical analysis</subject><ispartof>The European physical journal. C, Particles and fields, 2020-08, Vol.80 (8)</ispartof><rights>The Author(s) 2020. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,860,27901,27902</link.rule.ids></links><search><creatorcontrib>Anita</creatorcontrib><creatorcontrib>Bettoni, D</creatorcontrib><creatorcontrib>Bloms, J</creatorcontrib><creatorcontrib>Cetin, S A</creatorcontrib><creatorcontrib>Chang, W L</creatorcontrib><creatorcontrib>Chen, G</creatorcontrib><creatorcontrib>Denig, A</creatorcontrib><creatorcontrib>De, Mori F</creatorcontrib><creatorcontrib>Dong, M Y</creatorcontrib><creatorcontrib>Farinelli, R</creatorcontrib><creatorcontrib>Gao, X L</creatorcontrib><creatorcontrib>Gao, Y</creatorcontrib><creatorcontrib>Goetzen, K</creatorcontrib><creatorcontrib>Gong, L</creatorcontrib><creatorcontrib>Greco, M</creatorcontrib><creatorcontrib>Gu, M H</creatorcontrib><creatorcontrib>Guo, A Q</creatorcontrib><creatorcontrib>Guo, Y P</creatorcontrib><creatorcontrib>Guskov, A</creatorcontrib><creatorcontrib>He, K L</creatorcontrib><creatorcontrib>Huang, X Z</creatorcontrib><creatorcontrib>Jin, D P</creatorcontrib><creatorcontrib>Kappert, R</creatorcontrib><creatorcontrib>Keshk, I K</creatorcontrib><creatorcontrib>Kuessner, M</creatorcontrib><creatorcontrib>Kühn, W</creatorcontrib><creatorcontrib>Li, D M</creatorcontrib><creatorcontrib>Li F</creatorcontrib><creatorcontrib>Li G</creatorcontrib><creatorcontrib>Li, J C</creatorcontrib><creatorcontrib>Liao, L Z</creatorcontrib><creatorcontrib>Liu, B J</creatorcontrib><creatorcontrib>Liu, D</creatorcontrib><creatorcontrib>Liu, F H</creatorcontrib><creatorcontrib>Liu Huanhuan</creatorcontrib><creatorcontrib>Liu, J B</creatorcontrib><creatorcontrib>Liu, L Y</creatorcontrib><creatorcontrib>Liu, Q</creatorcontrib><creatorcontrib>Liu, X Y</creatorcontrib><creatorcontrib>Lu, H J</creatorcontrib><creatorcontrib>Lu, J D</creatorcontrib><creatorcontrib>Lusso, S</creatorcontrib><creatorcontrib>Ma, H L</creatorcontrib><creatorcontrib>Ma, L L</creatorcontrib><creatorcontrib>Maldaner, S</creatorcontrib><creatorcontrib>Malde, S</creatorcontrib><creatorcontrib>Mangoni, A</creatorcontrib><creatorcontrib>Marcello, S</creatorcontrib><creatorcontrib>Mezzadri, G</creatorcontrib><creatorcontrib>Min, J</creatorcontrib><creatorcontrib>Nakhoul, S</creatorcontrib><creatorcontrib>Nefedov, Y</creatorcontrib><creatorcontrib>Papenbrock, M</creatorcontrib><creatorcontrib>Qi M</creatorcontrib><creatorcontrib>Qian, S</creatorcontrib><creatorcontrib>Qin, X S</creatorcontrib><creatorcontrib>Qiu, J F</creatorcontrib><creatorcontrib>Qu, S Q</creatorcontrib><creatorcontrib>Ravindran, K</creatorcontrib><creatorcontrib>Rolo, M</creatorcontrib><creatorcontrib>Rosner Ch</creatorcontrib><creatorcontrib>Shao, M</creatorcontrib><creatorcontrib>Shen, P X</creatorcontrib><creatorcontrib>Sheng, H Y</creatorcontrib><creatorcontrib>Sosio, S</creatorcontrib><creatorcontrib>Sui, F F</creatorcontrib><creatorcontrib>Tan, Y X</creatorcontrib><creatorcontrib>Wang, B L</creatorcontrib><creatorcontrib>Wang, L S</creatorcontrib><creatorcontrib>Wang, P L</creatorcontrib><creatorcontrib>Wang, Y D</creatorcontrib><creatorcontrib>Wang, Y F</creatorcontrib><creatorcontrib>Wiedner, U</creatorcontrib><creatorcontrib>Xiao, S Y</creatorcontrib><creatorcontrib>Xiao, Y J</creatorcontrib><creatorcontrib>Xiao, Z J</creatorcontrib><creatorcontrib>Xie, Y H</creatorcontrib><creatorcontrib>Xu, Q J</creatorcontrib><creatorcontrib>Xu W</creatorcontrib><creatorcontrib>Yang, H J</creatorcontrib><creatorcontrib>Yang, R X</creatorcontrib><creatorcontrib>Yu, B X</creatorcontrib><creatorcontrib>Yu, C X</creatorcontrib><creatorcontrib>Yu, J S</creatorcontrib><creatorcontrib>Yuan, X Q</creatorcontrib><creatorcontrib>Zeng, Y</creatorcontrib><creatorcontrib>Zhang, C C</creatorcontrib><creatorcontrib>Zhang, J</creatorcontrib><creatorcontrib>Zhang, J Y</creatorcontrib><creatorcontrib>Zhang, J Z</creatorcontrib><creatorcontrib>Zhang, T J</creatorcontrib><creatorcontrib>Zhang, X Y</creatorcontrib><creatorcontrib>Zhang, Yan</creatorcontrib><creatorcontrib>Zhang, Yao</creatorcontrib><creatorcontrib>Zhao, Ling</creatorcontrib><creatorcontrib>Zhao, M G</creatorcontrib><creatorcontrib>Zhou, L P</creatorcontrib><creatorcontrib>Zhou, X</creatorcontrib><creatorcontrib>Zhu, X L</creatorcontrib><creatorcontrib>Zhuang, J</creatorcontrib><title>Observation of X(2370) and search for X(2120) in J/ψ→γKK¯η</title><title>The European physical journal. C, Particles and fields</title><description>Using a sample of 1.31×109J/ψ events collected with the BESIII detector, we perform a study of J/ψ→γKK¯η′. X(2370) is observed in the KK¯η′ invariant-mass distribution with a statistical significance of 8.3σ. Its resonance parameters are measured to be M=2341.6±6.5(stat.)±5.7(syst.)MeV/c2 and Γ=117±10(stat.)±8(syst.)MeV. The product branching fractions for J/ψ→γX(2370),X(2370)→K+K-η′ and J/ψ→γX(2370),X(2370)→KS0KS0η′ are determined to be (1.79±0.23(stat.)±0.65(syst.))×10-5 and (1.18±0.32(stat.)±0.39(syst.))×10-5, respectively. No evident signal for X(2120) is observed in the KK¯η′ invariant-mass distribution. The upper limits for the product branching fractions of B(J/ψ→γX(2120)→γK+K-η′) and B(J/ψ→γX(2120)→γKS0KS0η′) are determined to be 1.49×10-5 and 6.38×10-6 at the 90% confidence level, respectively.</description><subject>Confidence intervals</subject><subject>Invariants</subject><subject>Mass distribution</subject><subject>Statistical analysis</subject><issn>1434-6044</issn><issn>1434-6052</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNpjYJAzNNAzNDQx0E8tyErWLzY0MDA10jUwMtC1MDC30DVhYuA0NDE20TUDCrPA2SYmHAxcxcVZBgYGRiYGFpwMDv5JxalFZYklmfl5CvlpChEaRsbmBpoKiXkpCsWpiUXJGQpp-UUgYUMjoHBmnoKX_vmOR22Tzm329j60_tx2HgbWtMSc4lReKM3NoOzmGuLsoVtQlF9YmlpcEp-VX1qUB5SKNwK6wczQ2NTA3Jg4VQCVrUEg</recordid><startdate>20200801</startdate><enddate>20200801</enddate><creator>Anita</creator><creator>Bettoni, D</creator><creator>Bloms, J</creator><creator>Cetin, S A</creator><creator>Chang, W 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Y ; Lu, H J ; Lu, J D ; Lusso, S ; Ma, H L ; Ma, L L ; Maldaner, S ; Malde, S ; Mangoni, A ; Marcello, S ; Mezzadri, G ; Min, J ; Nakhoul, S ; Nefedov, Y ; Papenbrock, M ; Qi M ; Qian, S ; Qin, X S ; Qiu, J F ; Qu, S Q ; Ravindran, K ; Rolo, M ; Rosner Ch ; Shao, M ; Shen, P X ; Sheng, H Y ; Sosio, S ; Sui, F F ; Tan, Y X ; Wang, B L ; Wang, L S ; Wang, P L ; Wang, Y D ; Wang, Y F ; Wiedner, U ; Xiao, S Y ; Xiao, Y J ; Xiao, Z J ; Xie, Y H ; Xu, Q J ; Xu W ; Yang, H J ; Yang, R X ; Yu, B X ; Yu, C X ; Yu, J S ; Yuan, X Q ; Zeng, Y ; Zhang, C C ; Zhang, J ; Zhang, J Y ; Zhang, J Z ; Zhang, T J ; Zhang, X Y ; Zhang, Yan ; Zhang, Yao ; Zhao, Ling ; Zhao, M G ; Zhou, L P ; Zhou, X ; Zhu, X L ; Zhuang, J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_24346135073</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Confidence intervals</topic><topic>Invariants</topic><topic>Mass distribution</topic><topic>Statistical analysis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Anita</creatorcontrib><creatorcontrib>Bettoni, D</creatorcontrib><creatorcontrib>Bloms, J</creatorcontrib><creatorcontrib>Cetin, S A</creatorcontrib><creatorcontrib>Chang, W L</creatorcontrib><creatorcontrib>Chen, G</creatorcontrib><creatorcontrib>Denig, A</creatorcontrib><creatorcontrib>De, Mori F</creatorcontrib><creatorcontrib>Dong, M Y</creatorcontrib><creatorcontrib>Farinelli, R</creatorcontrib><creatorcontrib>Gao, X L</creatorcontrib><creatorcontrib>Gao, Y</creatorcontrib><creatorcontrib>Goetzen, K</creatorcontrib><creatorcontrib>Gong, L</creatorcontrib><creatorcontrib>Greco, M</creatorcontrib><creatorcontrib>Gu, M H</creatorcontrib><creatorcontrib>Guo, A Q</creatorcontrib><creatorcontrib>Guo, Y P</creatorcontrib><creatorcontrib>Guskov, A</creatorcontrib><creatorcontrib>He, K L</creatorcontrib><creatorcontrib>Huang, X Z</creatorcontrib><creatorcontrib>Jin, D P</creatorcontrib><creatorcontrib>Kappert, R</creatorcontrib><creatorcontrib>Keshk, I K</creatorcontrib><creatorcontrib>Kuessner, M</creatorcontrib><creatorcontrib>Kühn, W</creatorcontrib><creatorcontrib>Li, D M</creatorcontrib><creatorcontrib>Li F</creatorcontrib><creatorcontrib>Li G</creatorcontrib><creatorcontrib>Li, J C</creatorcontrib><creatorcontrib>Liao, L Z</creatorcontrib><creatorcontrib>Liu, B J</creatorcontrib><creatorcontrib>Liu, D</creatorcontrib><creatorcontrib>Liu, F H</creatorcontrib><creatorcontrib>Liu Huanhuan</creatorcontrib><creatorcontrib>Liu, J B</creatorcontrib><creatorcontrib>Liu, L Y</creatorcontrib><creatorcontrib>Liu, Q</creatorcontrib><creatorcontrib>Liu, X Y</creatorcontrib><creatorcontrib>Lu, H J</creatorcontrib><creatorcontrib>Lu, J D</creatorcontrib><creatorcontrib>Lusso, S</creatorcontrib><creatorcontrib>Ma, H L</creatorcontrib><creatorcontrib>Ma, L L</creatorcontrib><creatorcontrib>Maldaner, S</creatorcontrib><creatorcontrib>Malde, S</creatorcontrib><creatorcontrib>Mangoni, A</creatorcontrib><creatorcontrib>Marcello, S</creatorcontrib><creatorcontrib>Mezzadri, G</creatorcontrib><creatorcontrib>Min, J</creatorcontrib><creatorcontrib>Nakhoul, S</creatorcontrib><creatorcontrib>Nefedov, Y</creatorcontrib><creatorcontrib>Papenbrock, M</creatorcontrib><creatorcontrib>Qi M</creatorcontrib><creatorcontrib>Qian, S</creatorcontrib><creatorcontrib>Qin, X S</creatorcontrib><creatorcontrib>Qiu, J F</creatorcontrib><creatorcontrib>Qu, S Q</creatorcontrib><creatorcontrib>Ravindran, K</creatorcontrib><creatorcontrib>Rolo, M</creatorcontrib><creatorcontrib>Rosner Ch</creatorcontrib><creatorcontrib>Shao, M</creatorcontrib><creatorcontrib>Shen, P X</creatorcontrib><creatorcontrib>Sheng, H Y</creatorcontrib><creatorcontrib>Sosio, S</creatorcontrib><creatorcontrib>Sui, F F</creatorcontrib><creatorcontrib>Tan, Y X</creatorcontrib><creatorcontrib>Wang, B L</creatorcontrib><creatorcontrib>Wang, L S</creatorcontrib><creatorcontrib>Wang, P L</creatorcontrib><creatorcontrib>Wang, Y D</creatorcontrib><creatorcontrib>Wang, Y F</creatorcontrib><creatorcontrib>Wiedner, U</creatorcontrib><creatorcontrib>Xiao, S Y</creatorcontrib><creatorcontrib>Xiao, Y J</creatorcontrib><creatorcontrib>Xiao, Z J</creatorcontrib><creatorcontrib>Xie, Y H</creatorcontrib><creatorcontrib>Xu, Q J</creatorcontrib><creatorcontrib>Xu W</creatorcontrib><creatorcontrib>Yang, H J</creatorcontrib><creatorcontrib>Yang, R X</creatorcontrib><creatorcontrib>Yu, B X</creatorcontrib><creatorcontrib>Yu, C X</creatorcontrib><creatorcontrib>Yu, J S</creatorcontrib><creatorcontrib>Yuan, X Q</creatorcontrib><creatorcontrib>Zeng, Y</creatorcontrib><creatorcontrib>Zhang, C C</creatorcontrib><creatorcontrib>Zhang, J</creatorcontrib><creatorcontrib>Zhang, J Y</creatorcontrib><creatorcontrib>Zhang, J Z</creatorcontrib><creatorcontrib>Zhang, T J</creatorcontrib><creatorcontrib>Zhang, X Y</creatorcontrib><creatorcontrib>Zhang, Yan</creatorcontrib><creatorcontrib>Zhang, Yao</creatorcontrib><creatorcontrib>Zhao, Ling</creatorcontrib><creatorcontrib>Zhao, M G</creatorcontrib><creatorcontrib>Zhou, L P</creatorcontrib><creatorcontrib>Zhou, X</creatorcontrib><creatorcontrib>Zhu, X L</creatorcontrib><creatorcontrib>Zhuang, J</creatorcontrib><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Aerospace Database</collection><collection>SciTech Premium Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><jtitle>The European physical journal. C, Particles and fields</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Anita</au><au>Bettoni, D</au><au>Bloms, J</au><au>Cetin, S A</au><au>Chang, W L</au><au>Chen, G</au><au>Denig, A</au><au>De, Mori F</au><au>Dong, M Y</au><au>Farinelli, R</au><au>Gao, X L</au><au>Gao, Y</au><au>Goetzen, K</au><au>Gong, L</au><au>Greco, M</au><au>Gu, M H</au><au>Guo, A Q</au><au>Guo, Y P</au><au>Guskov, A</au><au>He, K L</au><au>Huang, X Z</au><au>Jin, D P</au><au>Kappert, R</au><au>Keshk, I K</au><au>Kuessner, M</au><au>Kühn, W</au><au>Li, D M</au><au>Li F</au><au>Li G</au><au>Li, J C</au><au>Liao, L Z</au><au>Liu, B J</au><au>Liu, D</au><au>Liu, F H</au><au>Liu Huanhuan</au><au>Liu, J B</au><au>Liu, L Y</au><au>Liu, Q</au><au>Liu, X Y</au><au>Lu, H J</au><au>Lu, J D</au><au>Lusso, S</au><au>Ma, H L</au><au>Ma, L L</au><au>Maldaner, S</au><au>Malde, S</au><au>Mangoni, A</au><au>Marcello, S</au><au>Mezzadri, G</au><au>Min, J</au><au>Nakhoul, S</au><au>Nefedov, Y</au><au>Papenbrock, M</au><au>Qi M</au><au>Qian, S</au><au>Qin, X S</au><au>Qiu, J F</au><au>Qu, S Q</au><au>Ravindran, K</au><au>Rolo, M</au><au>Rosner Ch</au><au>Shao, M</au><au>Shen, P X</au><au>Sheng, H Y</au><au>Sosio, S</au><au>Sui, F F</au><au>Tan, Y X</au><au>Wang, B L</au><au>Wang, L S</au><au>Wang, P L</au><au>Wang, Y D</au><au>Wang, Y F</au><au>Wiedner, U</au><au>Xiao, S Y</au><au>Xiao, Y J</au><au>Xiao, Z J</au><au>Xie, Y H</au><au>Xu, Q J</au><au>Xu W</au><au>Yang, H J</au><au>Yang, R X</au><au>Yu, B X</au><au>Yu, C X</au><au>Yu, J S</au><au>Yuan, X Q</au><au>Zeng, Y</au><au>Zhang, C C</au><au>Zhang, J</au><au>Zhang, J Y</au><au>Zhang, J Z</au><au>Zhang, T J</au><au>Zhang, X Y</au><au>Zhang, Yan</au><au>Zhang, Yao</au><au>Zhao, Ling</au><au>Zhao, M G</au><au>Zhou, L P</au><au>Zhou, X</au><au>Zhu, X L</au><au>Zhuang, J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Observation of X(2370) and search for X(2120) in J/ψ→γKK¯η</atitle><jtitle>The European physical journal. C, Particles and fields</jtitle><date>2020-08-01</date><risdate>2020</risdate><volume>80</volume><issue>8</issue><issn>1434-6044</issn><eissn>1434-6052</eissn><abstract>Using a sample of 1.31×109J/ψ events collected with the BESIII detector, we perform a study of J/ψ→γKK¯η′. X(2370) is observed in the KK¯η′ invariant-mass distribution with a statistical significance of 8.3σ. Its resonance parameters are measured to be M=2341.6±6.5(stat.)±5.7(syst.)MeV/c2 and Γ=117±10(stat.)±8(syst.)MeV. The product branching fractions for J/ψ→γX(2370),X(2370)→K+K-η′ and J/ψ→γX(2370),X(2370)→KS0KS0η′ are determined to be (1.79±0.23(stat.)±0.65(syst.))×10-5 and (1.18±0.32(stat.)±0.39(syst.))×10-5, respectively. No evident signal for X(2120) is observed in the KK¯η′ invariant-mass distribution. The upper limits for the product branching fractions of B(J/ψ→γX(2120)→γK+K-η′) and B(J/ψ→γX(2120)→γKS0KS0η′) are determined to be 1.49×10-5 and 6.38×10-6 at the 90% confidence level, respectively.</abstract><cop>Heidelberg</cop><pub>Springer Nature B.V</pub><doi>10.1140/epjc/s10052-020-8078-4</doi><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1434-6044 |
| ispartof | The European physical journal. C, Particles and fields, 2020-08, Vol.80 (8) |
| issn | 1434-6044 1434-6052 |
| language | eng |
| recordid | cdi_proquest_journals_2434613507 |
| source | DOAJ Directory of Open Access Journals; SpringerLink Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Springer Nature OA Free Journals |
| subjects | Confidence intervals Invariants Mass distribution Statistical analysis |
| title | Observation of X(2370) and search for X(2120) in J/ψ→γKK¯η |
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