排序方式: 共有14条查询结果,搜索用时 15 毫秒
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T. Eichten H. Deden F.J. Hasert W. Krenz J. Von Krogh D. Lanske J. Morfin H. Weerts G. Bertrand-Coremans J. Sacton W. Van Doninck P. Vilain D.C. Cundy D. Haidt M. Jaffre G. Kalbfleisch S. Natali P. Musset J.L. Pinfold 《Physics letters. [Part B]》1973,46(2):281-284
The total cross-sections for -nucleon scattering have been measured. A test has been made of the muon number conservation law. A limit of 2.4 GeV is found the mass of the “Georgi-Glashow type” heavy lepton 相似文献
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There are many speculations that there exist quarks Q considerably heavier than the charmed quark. Their Q states will display a far richer spectrum of monochromatic photon and hadron transitions than charmonium. The most important features of this spectrum — in particular, its dependence on the mass of Q — are outlined. 相似文献
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R. A. Briceñ o T. D. Cohen S. Coito J. J. Dudek E. Eichten C. S. Fischer M. Fritsch W. Gradl A. Jackura M. Kornicer G. Krein R. F. Lebed F. A. Machado R. E. Mitchell C. J. Morningstar M. Peardon M. R. Pennington K. Peters J. M. Richard C. P. Shen M. R. Shepherd T. Skwarnicki E. S. Swanson A. P. Szczepaniak C. Z. Yuan 《中国物理C(英文版)》2016,40(4):042001-042001
The last few years have been witness to a proliferation of new results concerning heavy exotic hadrons.Experimentally, many new signals have been discovered that could be pointing towards the existence of tetraquarks,pentaquarks, and other exotic configurations of quarks and gluons. Theoretically, advances in lattice field theory techniques place us at the cusp of understanding complex coupled-channel phenomena, modelling grows more sophisticated, and effective field theories are being applied to an ever greater range of situations. It is thus an opportune time to evaluate the status of the field. In the following, a series of high priority experimental and theoretical issues concerning heavy exotic hadrons is presented. 相似文献
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Bo Wang Hao Xu Xiang Liu Dian-Yong Chen Susana Coito Estia Eichten 《Frontiers of Physics》2016,11(3):111402
Very recently, the Belle and BESIII experiments observed a new charmonium-like state X(3823), which is a good candidate for the D-wave charmonium ψ(13D2). Because the X(3823) is just near the D ¯D∗ threshold, the decay X(3823)→ J/ψπ+π− can be a golden channel to test the significance of coupled-channel effects. In this work, this decay is considered including both the hidden-charm dipion and the usual quantum chromodynamics multipole expansion (QCDME) contributions. The partial decay width, the dipion invariant mass spectrum distribution dΓ[X(3823) → J/ψπ+π−]/dmπ+π−, and the corresponding dΓ[X(3823) → J/ψπ+π−]/d cos θ distribution are computed. Many parameters are determined from existing experimental data, so the results depend mainly only on one unknown phase between the QCDME and hidden-charm dipion amplitudes. 相似文献