期刊
PHYSICAL REVIEW D
卷 105, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.105.012005
关键词
-
资金
- BMBF-Bundesministerium fur Bildung und Forschung (Germany)
- DFG-German Research Foundation, Transregional Research Center (Germany) [TR110]
- MEYS (Czech Republic) [LM20150581]
- European Union [283286]
- B. Sen fund (India)
- CERN-RFBR [12-02-91500]
- FCT (Portugal) [CERN/FIS-PAR/0007/2017, CERN/FIS-PAR/0022/2019]
- MEXT (Japan) [18002006, 20540299, 18540281, 26247032]
- JSPS (Japan) [18002006, 20540299, 18540281, 26247032]
- Daiko Foundation (Japan)
- Yamada Foundation (Japan)
- Ministry of Science and Technology (Taiwan)
- Israel Academy of Sciences and Humanities (Israel)
- Tomsk Polytechnic University Competitiveness Enhancement Program (Russia)
- National Science Foundation (USA) [PHY-1506416]
- NCN (Poland) [2017/26/M/ST2/00498]
- European Union's Horizon 2020 research and innovation programme [824093]
- DFG cluster of excellence 'Origin and Structure of the Universe' (Germany)
- DFG Research Training Group Programmes (Germany) [1102, 2044]
- ANR, France [ANR-10-LBX-0038, ANR-11-IDEX-003-01]
- Grants-in-Aid for Scientific Research [26247032] Funding Source: KAKEN
- Fundação para a Ciência e a Tecnologia [CERN/FIS-PAR/0007/2017, CERN/FIS-PAR/0022/2019] Funding Source: FCT
In this study, we investigate the spin-exotic amplitude and nonresonant contributions in the single-diffractive dissociation of pions. By analyzing the equations and comparing the results with simulated data, we find significant effects of resonances and nonresonant contributions on the produced hadron system. These findings are important for understanding the properties and characteristics of spin-exotic amplitudes.
We study the spin-exotic J(PC)=1(-+) amplitude in single-diffractive dissociation of 190 GeV/c pions into pi(-)pi(-)pi(+) using a hydrogen target and confirm the pi(1)(1600) -> rho(770)pi amplitude, which interferes with a nonresonant 1(-+) amplitude. We demonstrate that conflicting conclusions from previous studies on these amplitudes can be attributed to different analysis models and different treatment of the dependence of the amplitudes on the squared four-momentum transfer and we thus reconcile these experimental findings. We study the nonresonant contributions to the pi(-)pi(-)pi(+) final state using pseudodata generated on the basis of a Deck model. Subjecting pseudodata and real data to the same partial-wave analysis, we find good agreement concerning the spectral shape and its dependence on the squared four-momentum transfer for the J(PC)=1(-+) amplitude and also for amplitudes with other J(PC) quantum numbers. We investigate for the first time the amplitude of the pi(-)pi(+) subsystem with J(PC)=1(--) in the 3 pi amplitude with J(PC)=1(-+) employing the novel freed-isobar analysis scheme. We reveal this pi(-)pi(+) amplitude to be dominated by the rho(770) for both the pi(1)(1600) and the nonresonant contribution. These findings largely confirm the underlying assumptions for the isobar model used in all previous partial-wave analyses addressing the J(PC)=1(-+) amplitude.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据