Search for K0SK0S in J/ψ and ψ(2S) decays

Bai, J. Z.; Ban, Y.; Bian, J. G.; Cai, X.; Chang, J. F.; Chen, H.F.; Chen, H.S.; Chen, H.X.; Chen, J.; Chen, J.C.; Chen, Jun; Chen, M.L.; Chen, Y.B.; Chi, S.; Chu, Y. P.; Cui, X. Z.; Dai, H. L.; Dai, Y. S.; Deng, Z. Y.; Liu, Dong; Du, S. X.; Du, Z. Z.; Fang, J.; Fang, S. S.; Fu, C.D.; Fu, Hai-Bing; Fu, L. P.; Gao, C. S.; Gao, M.; Gao, Y.; Gong, Ming; Gong, W. X.; Gu, S.; Guo, Y. N.; Guo, Y. Q.; Guo, Z.; Han, S.; Harris, F. A.; He, J.; He, K. L.; He, Miao; He, X. Q.; Heng, Y. K.; Hu, H. M.; Hu, T.; Huang, G. S.; Huang, L. Q.; Huang, X. P.; Ji, Xiangdong; Jia, Qing; Jiang, C. H.; Jiang, X. S.; Jin, D. P.; Jin, S.; Jin, Y.; Lai, Y. F.; Li, F.; Li, G.; Li, H.H.; Li, J.; Li, J.C.; Li, Q.J.; Li, R.B.; Li, R.Y.; Li, S.M.; Li, W.; Li, W.G.; Li, X.L.; Li, X.Q.; Li, X.S.; Liang, Y. F.; Liao, H.; Liu, C.X.; Liu, Fang; Liu, F.; Liu, H.M.; Liu, J.B.; Liu, J.P.; Liu, R.G.; Liu, Y.; Liu, Z.A.; Liu, Z.X.; Lu, G. R.; Lu, F. X.; Lu, J. G.; Luo, C. L.; Luo, X. L.; Ma, F.C.; Ma, J.; Ma, L.; Ma, Xingxiao; Mao, Z. P.; Meng, X. C.; Mo, X. H.; Nie, J.; Nie, Z. D.; Olsen, S. L.; Peng, H.; Qi, N. D.; Qian, C. D.; H, Qin; Qiu, J. F.; Ren, Z.; Rong, G.; Shan, L. Y.; Shang, L.; Shen, D. L.; Shen, X. Y.; Sheng, H. Y.; Shi, Feng; Shi, X.; Song, L.; Sun, H.; Sun, S. S.; Sun, Y. Z.; Sun, Zhi‐Wei; Tang, X.; Tao, N.; Tian, Yang; Tong, G. L.; Varner, G.; Wang, D.Y.; Wang, J.Z.; Wang, L.; Wang, L.S.; Wang, M.; Wang, Meng; Wang, P.; Wang, P.L.; Wang, S.Z.; Wang, W.F.; Wang, Y.F.; Wang, Zhe; Wang, Z.; Wang, Zheng; Wang, Z.Y.; Wei, C.; Wu, N.; Wu, Y. M.; Xia, X. M.; Xie, X. X.; Xin, B.; Xu, G. F.; Xu, H. Y.; Yin, Xuefeng; Xue, S.; Yan, Mu-Lin; Yan, W.; Yang, F.; Yang, H. X.; Yang, J.; Yang, S.; Yang, Yifan; Yi, L. H.; Yi, Z. Y.; Ye, M.; Ye, M.H.; Ye, Y.X.; Chen, Yu; Yu, G.; Yuan, C. Z.; Yuan, J. M.; Yuan, Y.; Yue, Q.; Zang, S. L.; Zeng, Y.; Zhang, B.X.; Zhang, B.Y.; Zhang, C.C.; Zhang, D.H.; Zhang, H.Y.; Zhang, J.; Zhang, J.M.; Zhang, J.Y.; Zhang, J.W.; Zhang, L.S.; Zhang, Q.J.; Zhang, S.Q.; Zhang, X.M.; Zhang, X.Y.; Zhang, Yiyun; Zhang, Y.J.; Zhang, Y.Y.; Zhang, Z.P.; Zhang, Z.Q.; Zhao, Dongxu; Zhao, J. B.; Zhao, Jiawei; Zhao, P. P.; Zhao, W. R.; Zhao, Xinli; Zhao, Y. B.; Zhao, Z.; Zheng, Han-Qing; Zheng, J. P.; Zheng, Lei; Zheng, Z. P.; Zhong, X. C.; Zhou, B.; Zhou, G. M.; Zhou, L.; Zhou, Na; Zhu, K. J.; Zhu, Q. M.; Zhu, Y. M.; Zhu, Y.; Zhu, Y. S.; Zhu, Z. A.; Zhuang, B. A.; Zou, B. S.

doi:10.1016/j.physletb.2004.03.047

Cited by 6 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The expected number of J/ψ at the EIC for 100 fb −1 is in the range (20 − 70) × 10 6 for y > 0.001, depending on the CM energy planned for the EIC This was estimated [33] using a leading-order Monte Carlo simulation for all decay channels. This statistics is in direct competition with BES data [31].…”

Section: Particle Spectroscopysupporting

confidence: 61%

“…The K 0 S K 0 S pairs provide a clean sample of well-identified particle pairs that can also be used for searches of the CP violating processes in charmonium decays [31], such as J/ψ → K 0 S K 0 S or υ(2S) → K 0 S K 0 S . Similarly, the BaBar collaboration searched for the CP-violating asymmetries for B decays into charmless two-body final states [32], i.e.…”

Section: Particle Spectroscopymentioning

confidence: 99%

See 1 more Smart Citation

Some aspects of impact of the Electron Ion Collider on particle physics at the Energy Frontier

Chekanov¹,

Magill²

2022

Preprint

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This overview describes several science cases at the Electron-Ion-Collider (EIC) experiment which are traditional to general particle physics. It has an emphasis on connections between future measurements at the EIC and the physics topics explored at high-energy frontier colliders. It covers several selected topics, such as parton density functions, multi-quarks states, correlations of final-state particles, precision QCD measurements and forward jet physics. We will discuss possible EIC measurements that can improve previous experimental results obtained at high-energy (HEP) experiments.

show abstract

Section: Particle Spectroscopysupporting

confidence: 61%

Section: Particle Spectroscopymentioning

confidence: 99%

Some aspects of impact of the Electron Ion Collider on particle physics at the Energy Frontier

Chekanov¹,

Magill²

2022

Preprint

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show abstract

“…For ψ(2S), the BES Collaboration has given an upper limit at 95% C.L. Br(ψ(2S) → K S K S ) < 4.6 × 10 −6 in 2004 [14] while the calculated value under the locality assumption is (2.1 ± 0.3) × 10 −6 . The experimental upper limit is still above the calculated value and unable to exclude the hypothesis of locality yet.…”

Section: Results and Comparison With Experimentsmentioning

confidence: 97%

Test of quantum nonlocality via vector meson decays to KSKS

Jiang

Wang

2021

Int. J. Mod. Phys. A

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In the system of a pair of quantum-entangled neutral kaons from meson decays, when one kaon collapses into the [Formula: see text] state, the other will collapse instantaneously into the [Formula: see text] state, due to entanglement and nonlocality. However, if the alternative hypothesis is correct and there is a time window during which one kaon is unaware that the other has decayed, some quantum mechanically prohibited [Formula: see text] decays may occur. We calculate the branching ratios of [Formula: see text] in vector meson decays under locality hypothesis and compare them with experimental results. We show that the branching ratio of [Formula: see text] under locality assumption is already excluded by the BESIII experimental upper limit. Additional experimental results are proposed to perform this test in the future.

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“…and B(ψ(2S) → K S K S ) < 4.6 × 10 −6 , respectively [8]. The current bounds of the production rates are beyond the sensitivity for testing R SS .…”

mentioning

confidence: 89%

Clean Prediction ofCP-Violating Processesψ,ϕ, andΥ(1
Li
¹
,
Yang
²

2006
Phys. Rev. Lett.
6
0
4
0
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The ratio of KSKS (KLKL) and KSKL production rates is calculated by considering K 0 − K 0 oscillation in J/ψ → K 0 K 0 decay. The theoretical uncertainty due to strong interaction in J/ψ decay is completely canceled in the ratio, therefore, the absolute branching fractions of the CP violating processes of J/ψ → KSKS and KLKL can be cleanly and model-independently determined in case that J/ψ → KSKL decay is precisely measured. In the future τ -Charm factory, the expected CP violating process of J/ψ → KSKS should be reached. It is important to measure J/ψ to KSKS and KSKL decays simultaneously, so that many systematic errors will be canceled. More precise measurements are suggested to examine the predicted isospin relation in J/ψ → KK decays. All results can be extended to decays of other vector quarkonia, φ, ψ(2S) and Υ (1S) and so on.PACS numbers: 13.25. Gv, 11.30.Er In the Standard Model (SM), CP violation arises from an irreducible weak phase in the Cabibbo-KobayashiMaskawa (CKM) quark-mixing matrix [1]. CP violation has been established in both K and B systems. Currently, all experimental measurements are consistent with the CKM picture of CP violation, and the CKM is, very likely, the dominant source of CP violation in low energy flavor-changing processes [2]. However, the surprising point is that the CKM mechanism for CP violation fails to account for the baryogenesis [3]. It is crucial to probe CP violation in various reactions, to see the correlations between different processes and probe the source of CP violation.In this Letter, we consider the possible CP asymmet-Within the SM, the possible CP violating decay processes of J/ψ → K S K S and K L K L are due to K 0 − K 0 oscillation, here we assume that possible strong multiquark effects that involve seaquarks play no role in. The J/ψ decays will provide another opportunity to understand the source of CP violation. The amplitude for J/ψ decaying to0 |H|J/ψ , and the K 0 K 0 pair system is in a state with charge parity C = −1, which can be defined asAlthough there is weak current contribution in J/ψ → K 0 K 0 decay, which may not conserve charge parity, the K 0 K 0 pair can not be in a state with C = +1. The reason is that the relative orbital angular momentum of K 0 K 0 pair must be l = 1 because of angular momentum conservation. A boson-pair with l = 1 must be in an antisymmetric state, the anti-symmetric state of particleanti-particle pair must be in a state with C = −1. This conclusion can also be illustrated by a direct calculation.For explicitness, let us denote the particle state |K 0 with momentum p 1 as |K 0 (p 1 ) , and |K 0 with momentum p 2 as |K 0 (p 2 ) . The general structure of the effectivewhere q i (i = d, s) and c denote the quarks d, s and c, C W is the Wilson coefficient, and a, b, a ′ , b ′ are the relevant coefficients for the vector and axial-vector currents. Then the amplitude for J/ψ decaying into a state

show abstract

Search for K0SK0S in J/ψ and ψ(2S) decays

Cited by 6 publications

References 14 publications

Some aspects of impact of the Electron Ion Collider on particle physics at the Energy Frontier

Some aspects of impact of the Electron Ion Collider on particle physics at the Energy Frontier

Test of quantum nonlocality via vector meson decays to KSKS

Clean Prediction ofCP-Violating Processesψ,ϕ, andΥ(1
Li
¹
,
Yang
²

2006
Phys. Rev. Lett.
6
0
4
0
View full text Add to dashboard Cite

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Search for K0SK0S in J/ψ and ψ(2S) decays

Cited by 6 publications

References 14 publications

Some aspects of impact of the Electron Ion Collider on particle physics at the Energy Frontier

Some aspects of impact of the Electron Ion Collider on particle physics at the Energy Frontier

Test of quantum nonlocality via vector meson decays to KSKS

Clean Prediction ofCP-Violating Processesψ,ϕ, andΥ(1Li1, Yang2 2006Phys. Rev. Lett.6040View full textAdd to dashboardCite

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Clean Prediction ofCP-Violating Processesψ,ϕ, andΥ(1
Li
¹
,
Yang
²

2006
Phys. Rev. Lett.
6
0
4
0
View full text Add to dashboard Cite