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Guo, FK
Novel Method for Precisely Measuring the X(3872) Mass
AbstractThe X(3872) is the first and the most interesting one amongst the abundant XYZ states. Its mass coincides exactly with the D-0(D) over bar*(0) threshold with an uncertainty of 180 keV. Precise knowledge of its mass is crucial to understand the X(3872). However, whether it is above or below the D-0(D) over bar*(0) threshold is still unknown. We propose a completely new method to measure the X(3872) mass precisely by measuring the X(3872)gamma line shape between 4010 and 4020 MeV, which is strongly sensitive to the X(3872) mass relative to the D-0(D) over bar*(0) threshold due to a triangle singularity. This method can be applied to experiments which produce copious D*(0)(D) over bar*(0) pairs, such as electron-positron, proton-antiproton, and other experiments, and may lead to much more precise knowledge of the X(3872) mass.
Subject AreaPhysics
MOST Discipline CataloguePhysics, Multidisciplinary
Indexed BySCIE
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Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Guo, FK. Novel Method for Precisely Measuring the X(3872) Mass[J]. PHYSICAL REVIEW LETTERS,2019,122(20):202002.
APA Guo, FK.(2019).Novel Method for Precisely Measuring the X(3872) Mass.PHYSICAL REVIEW LETTERS,122(20),202002.
MLA Guo, FK."Novel Method for Precisely Measuring the X(3872) Mass".PHYSICAL REVIEW LETTERS 122.20(2019):202002.
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