Limits on spin 0 bosons in e+e− annihilation up to 45.2 GeV CM energy
Limits on spin 0 bosons in e+e− annihilation up to 45.2 GeV CM energy
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在高达 45.2 GeV CM 能量的 e+e− 湮灭中自旋 0 玻色子的限制
DOI：
10.1016/0370-2693(84)91063-3
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
J. Grunhaus
中科院分区：
文献类型：
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作者：
H. Behrend;J. Buerger;L. Criegee;H. Fenner;G. Franke;V. Meyer;V. Schroeder;H. Sindt;U. Timm;G. Winter;W. Zimmermann;P. Bussey;A. Campbell;J. Dainton;D. Hendry;J. Scarr;I. Skillicorn;K. Smith;M. Poppe;H. Spitzer;O. Achterberg;G. D'Agostini;W. Apel;J. Engler;G. Fluegge;B. Forstbauer;D. Fries;W. Fues;K. Gamerdinger;T. Henkes;G. Hopp;J. Knapp;M. Krueger;H. Kuester;H. Mueller;H. Randoll;K. Ranitzsch;G. Schmidt;H. Schneider;W. Boer;G. Buschhorn;G. Grindhammer;P. Grosse;B. Gunderson;C. Kiesling;R. Kotthaus;H. Lierl;D. Lueers;H. Oberlack;P. Schacht;G. Bonneaud;P. Colas;A. Cordier;M. Davier;D. Fournier;J. Grivaz;J. Haissinski;V. Journé;F. Diberder;U. Mallik;E. Ros;J. Veillet;J. Field;R. George;G. M. Goldber;O. Hamon;F. Kapusta;F. Kovacs;R. Pain;L. Poggioli;M. Rivoal;M. Gaspero;B. Stella;R. Aleskan;J. Bouchez;G. Carnesecchi;G. Cozzika;Y. Ducros;A. Gaidot;P. Jarry;Y. Lavagne;F. Saada;J. Paméla;J. Pansart;F. Pierre;G. Alexander;G. Bella;Y. Gnat;J. Grunhaus
我们用Petra的大提琴探测器在39.8GeV到45.2GeV的质心能量范围内研究了e+e−→e+e−，e+e−→γγ，e+e−→μ+μ−和e+e−→τ+τ−反应。确定了质量既在能量范围内又在能量范围以上的新自旋0玻色子的部分宽度的上限。没有证据表明这种新粒子的贡献，直到最高的佩特拉能量以一种模型无关的方式。在最近提出的将自旋为0的玻色子的存在与Z0的辐射宽度Γτ联系起来的模型的假设下，如果Γτ&>20 MeV，则对于低于Z0质量的质量，我们在95%的置信度水平上排除了这种玻色子。
We have studied the reactions e+e−→ e+e−, e+e−→ γγ, e+e−→ μ+μ−, and e+e−→ τ+τ−in the centre-of-mass (CM) energy range from 39.8 to 45.2 GeV using the CELLO detector at PETRA. Upper limits on the partial widths for new spin 0 bosons with masses both within and above the energy range covered are determined. No evidence for contributions of such new particles has been observed up to the highest PETRA energies in a model independent way. Under the assumptions of recently suggested models relating the existence of spin 0 bosons to the radiative width Γτof the Z0we exclude such bosons at the 95% confidence level for masses below the Z0-mass if Γτ> 20 MeV.