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Related papers: WWF: a generator for e+e- to 4 fermions + gamma

200 papers

We performed a detailed analysis of the process $e^+e^-\to \ell \nu q\bar{q}'$ where we included all tree level Feynman diagrams that contribute to this final state. We studied the sensitivity of this process to anomalous trilinear gauge…

High Energy Physics - Phenomenology · Physics 2010-01-15 Mikulas Gintner , Stephen Godfrey , Gilles Couture

A new mechanism is presented for the generation of quark and lepton masses, based on a heavy fourth family and a new sector of massless fermions. The massless fermions have only discrete chiral symmetries and they are confined by the…

High Energy Physics - Phenomenology · Physics 2009-10-22 B. Holdom

We present an extension of the Standard Model (SM) without supersymmetry, which we use to calculate order of magnitude values for the elements of the mass matrices in the SM. In our model we can fit the 9 quark and lepton masses and 3…

High Energy Physics - Phenomenology · Physics 2009-10-28 C. D. Froggatt , H. B. Nielsen , D. J. Smith

An S-Matrix ansatz is used to determine the mass and width of the Z boson, as well as the contributions of gamma/Z interference and Z boson exchange to fermion-pair production. For this purpose we use hadron and lepton-pair production cross…

High Energy Physics - Experiment · Physics 2012-08-27 L3 Collaboration

Using a nonperturbative approach based on the Cornwall-Jackiw-Tomboulis (CJT) effective action $\Gamma(S)$ for composite operators, the phase structure of the simplest massless (2 + 1)-dimensional Gross-Neveu model is investigated. We have…

High Energy Physics - Theory · Physics 2022-01-05 T. G. Khunjua , K. G. Klimenko , R. N. Zhokhov

The nonlinear interaction of intense linearly polarized electromagnetic waves (EMWs) with longitudinal electron density perturbations is revisited in relativistic degenerate plasmas. The nonlinear dynamics of the EMWs and the longitudinal…

Plasma Physics · Physics 2020-01-13 S. Roy , D. Chatterjee , A. P. Misra

Electroweak processes with four fermions in the final state were measured extensively at LEP-2 in e+e- collisions with centre-of-mass energies up to 209 GeV. By combining the results obtained by Aleph, Delphi, L3 and Opal, the predictions…

High Energy Physics - Experiment · Physics 2007-05-23 Philip Bambade

An exclusive event generator is designed for the $e^+e^-$ scan experiments with the initial state radiation effects up to the second order correction included. There are seventy hadronic decay modes available with the effective…

High Energy Physics - Phenomenology · Physics 2015-06-17 Rong-Gang Ping

We study the process $e^{+}e^{-}\to\Lambda_{c}^{+}\bar{\Lambda}_c^{-}$ at twelve center-of-mass energies from $4.6119$ to $4.9509~\mathrm{GeV}$ using data samples collected by the BESIII detector at the BEPCII collider. The Born cross…

High Energy Physics - Experiment · Physics 2024-02-05 BESIII Collaboration , M. Ablikim , M. N. Achasov , P. Adlarson , X. C. Ai , R. Aliberti , A. Amoroso , M. R. An , Q. An , Y. Bai , O. Bakina , I. Balossino , Y. Ban , V. Batozskaya , K. Begzsuren , N. Berger , M. Berlowski , M. Bertani , D. Bettoni , F. Bianchi , E. Bianco , A. Bortone , I. Boyko , R. A. Briere , A. Brueggemann , H. Cai , X. Cai , A. Calcaterra , G. F. Cao , N. Cao , S. A. Cetin , J. F. Chang , T. T. Chang , W. L. Chang , G. R. Che , G. Chelkov , C. Chen , Chao Chen , G. Chen , H. S. Chen , M. L. Chen , S. J. Chen , S. M. Chen , T. Chen , X. R. Chen , X. T. Chen , Y. B. Chen , Y. Q. Chen , Z. J. Chen , W. S. Cheng , S. K. Choi , X. Chu , G. Cibinetto , S. C. Coen , F. Cossio , J. J. Cui , H. L. Dai , J. P. Dai , A. Dbeyssi , R. E. de Boer , D. Dedovich , Z. Y. Deng , A. Denig , I. Denysenko , M. Destefanis , F. De Mori , B. Ding , X. X. Ding , Y. Ding , Y. Ding , J. Dong , L. Y. Dong , M. Y. Dong , X. Dong , M. C. Du , S. X. Du , Z. H. Duan , P. Egorov , Y. H. Y. Fan , Y. L. Fan , J. Fang , S. S. Fang , W. X. Fang , Y. Fang , R. Farinelli , L. Fava , F. Feldbauer , G. Felici , C. Q. Feng , J. H. Feng , K Fischer , M. Fritsch , C. Fritzsch , C. D. Fu , J. L. Fu , Y. W. Fu , H. Gao , Y. N. Gao , Yang Gao , S. Garbolino , I. Garzia , P. T. Ge , Z. W. Ge , C. Geng , E. M. Gersabeck , A Gilman , K. Goetzen , L. Gong , W. X. Gong , W. Gradl , S. Gramigna , M. Greco , M. H. Gu , C. Y Guan , Z. L. Guan , A. Q. Guo , L. B. Guo , M. J. Guo , R. P. Guo , Y. P. Guo , A. Guskov , T. T. Han , W. Y. Han , X. Q. Hao , F. A. Harris , K. K. He , K. L. He , F. H. H. Heinsius , C. H. Heinz , Y. K. Heng , C. Herold , T. Holtmann , P. C. Hong , G. Y. Hou , X. T. Hou , Y. R. Hou , Z. L. Hou , H. M. Hu , J. F. Hu , T. Hu , Y. Hu , G. S. Huang , K. X. Huang , L. Q. Huang , X. T. Huang , Y. P. Huang , T. Hussain , N Hüsken , W. Imoehl , J. Jackson , S. Jaeger , S. Janchiv , J. H. Jeong , Q. Ji , Q. P. Ji , X. B. Ji , X. L. Ji , Y. Y. Ji , X. Q. Jia , Z. K. Jia , H. J. Jiang , P. C. Jiang , S. S. Jiang , T. J. Jiang , X. S. Jiang , Y. Jiang , J. B. Jiao , Z. Jiao , S. Jin , Y. Jin , M. Q. Jing , T. Johansson , X. K. , S. Kabana , N. Kalantar-Nayestanaki , X. L. Kang , X. S. Kang , R. Kappert , M. Kavatsyuk , B. C. Ke , A. Khoukaz , R. Kiuchi , R. Kliemt , O. B. Kolcu , B. Kopf , M. Kuessner , A. Kupsc , W. Kühn , J. J. Lane , P. Larin , A. Lavania , L. Lavezzi , T. T. Lei , Z. H. Lei , H. Leithoff , M. Lellmann , T. Lenz , C. Li , C. Li , C. H. Li , Cheng Li , D. M. Li , F. Li , G. Li , H. Li , H. B. Li , H. J. Li , H. N. Li , Hui Li , J. R. Li , J. S. Li , J. W. Li , K. L. Li , Ke Li , L. J Li , L. K. Li , Lei Li , M. H. Li , P. R. Li , Q. X. Li , S. X. Li , T. Li , W. D. Li , W. G. Li , X. H. Li , X. L. Li , Xiaoyu Li , Y. G. Li , Z. J. Li , C. Liang , H. Liang , H. Liang , H. Liang , Y. F. Liang , Y. T. Liang , G. R. Liao , L. Z. Liao , Y. P. Liao , J. Libby , A. Limphirat , D. X. Lin , T. Lin , B. J. Liu , B. X. Liu , C. Liu , C. X. Liu , F. H. Liu , Fang Liu , Feng Liu , G. M. Liu , H. Liu , H. M. Liu , Huanhuan Liu , Huihui Liu , J. B. Liu , J. L. Liu , J. Y. Liu , K. Liu , K. Y. Liu , Ke Liu , L. Liu , L. C. Liu , Lu Liu , M. H. Liu , P. L. Liu , Q. Liu , S. B. Liu , T. Liu , W. K. Liu , W. M. Liu , X. Liu , Y. Liu , Y. Liu , Y. B. Liu , Z. A. Liu , Z. Q. Liu , X. C. Lou , F. X. Lu , H. J. Lu , J. G. Lu , X. L. Lu , Y. Lu , Y. P. Lu , Z. H. Lu , C. L. Luo , M. X. Luo , T. Luo , X. L. Luo , X. R. Lyu , Y. F. Lyu , F. C. Ma , H. L. Ma , J. L. Ma , L. L. Ma , M. M. Ma , Q. M. Ma , R. Q. Ma , R. T. Ma , X. Y. Ma , Y. Ma , Y. M. Ma , F. E. Maas , M. Maggiora , S. Malde , Q. A. Malik , A. Mangoni , Y. J. Mao , Z. P. Mao , S. Marcello , Z. X. Meng , J. G. Messchendorp , G. Mezzadri , H. Miao , T. J. Min , R. E. Mitchell , X. H. Mo , N. Yu. Muchnoi , J. Muskalla , Y. Nefedov , F. Nerling , I. B. Nikolaev , Z. Ning , S. Nisar , Y. Niu , S. L. Olsen , Q. Ouyang , S. Pacetti , X. Pan , Y. Pan , A. Pathak , P. Patteri , Y. P. Pei , M. Pelizaeus , H. P. Peng , K. Peters , J. L. Ping , R. G. Ping , S. Plura , S. Pogodin , V. Prasad , F. Z. Qi , H. Qi , H. R. Qi , M. Qi , T. Y. Qi , S. Qian , W. B. Qian , C. F. Qiao , J. J. Qin , L. Q. Qin , X. P. Qin , X. S. Qin , Z. H. Qin , J. F. Qiu , S. Q. Qu , C. F. Redmer , K. J. Ren , A. Rivetti , V. Rodin , M. Rolo , G. Rong , Ch. Rosner , S. N. Ruan , N. Salone , A. Sarantsev , Y. Schelhaas , K. Schoenning , M. Scodeggio , K. Y. Shan , W. Shan , X. Y. Shan , J. F. Shangguan , L. G. Shao , M. Shao , C. P. Shen , H. F. Shen , W. H. Shen , X. Y. Shen , B. A. Shi , H. C. Shi , J. L. Shi , J. Y. Shi , Q. Q. Shi , R. S. Shi , X. Shi , J. J. Song , T. Z. Song , W. M. Song , Y. J. Song , Y. X. Song , S. Sosio , S. Spataro , F. Stieler , Y. J. Su , G. B. Sun , G. X. Sun , H. Sun , H. K. Sun , J. F. Sun , K. Sun , L. Sun , S. S. Sun , T. Sun , W. Y. Sun , Y. Sun , Y. J. Sun , Y. Z. Sun , Z. T. Sun , Y. X. Tan , C. J. Tang , G. Y. Tang , J. Tang , Y. A. Tang , L. Y Tao , Q. T. Tao , M. Tat , J. X. Teng , V. Thoren , W. H. Tian , W. H. Tian , Y. Tian , Z. F. Tian , I. Uman , S. J. Wang , B. Wang , B. L. Wang , Bo Wang , C. W. Wang , D. Y. Wang , F. Wang , H. J. Wang , H. P. Wang , J. P. Wang , K. Wang , L. L. Wang , M. Wang , Meng Wang , S. Wang , S. Wang , T. Wang , T. J. Wang , W. Wang , W. Wang , W. P. Wang , X. Wang , X. F. Wang , X. J. Wang , X. L. Wang , Y. Wang , Y. D. Wang , Y. F. Wang , Y. H. Wang , Y. N. Wang , Y. Q. Wang , Yaqian Wang , Yi Wang , Z. Wang , Z. L. Wang , Z. Y. Wang , Ziyi Wang , D. Wei , D. H. Wei , F. Weidner , S. P. Wen , C. W. Wenzel , U. Wiedner , G. Wilkinson , M. Wolke , L. Wollenberg , C. Wu , J. F. Wu , L. H. Wu , L. J. Wu , X. Wu , X. H. Wu , Y. Wu , Y. J. Wu , Z. Wu , L. Xia , X. M. Xian , T. Xiang , D. Xiao , G. Y. Xiao , S. Y. Xiao , Y. L. Xiao , Z. J. Xiao , C. Xie , X. H. Xie , Y. Xie , Y. G. Xie , Y. H. Xie , Z. P. Xie , T. Y. Xing , C. F. Xu , C. J. Xu , G. F. Xu , H. Y. Xu , Q. J. Xu , Q. N. Xu , W. Xu , W. L. Xu , X. P. Xu , Y. C. Xu , Z. P. Xu , Z. S. Xu , F. Yan , L. Yan , W. B. Yan , W. C. Yan , X. Q. Yan , H. J. Yang , H. L. Yang , H. X. Yang , Tao Yang , Y. Yang , Y. F. Yang , Y. X. Yang , Yifan Yang , Z. W. Yang , Z. P. Yao , M. Ye , M. H. Ye , J. H. Yin , Z. Y. You , B. X. Yu , C. X. Yu , G. Yu , J. S. Yu , T. Yu , X. D. Yu , C. Z. Yuan , L. Yuan , S. C. Yuan , X. Q. Yuan , Y. Yuan , Z. Y. Yuan , C. X. Yue , A. A. Zafar , F. R. Zeng , X. Zeng , Y. Zeng , Y. J. Zeng , X. Y. Zhai , Y. C. Zhai , Y. H. Zhan , A. Q. Zhang , B. L. Zhang , B. X. Zhang , D. H. Zhang , G. Y. Zhang , H. Zhang , H. H. Zhang , H. H. Zhang , H. Q. Zhang , H. Y. Zhang , J. J. Zhang , J. L. Zhang , J. Q. Zhang , J. W. Zhang , J. X. Zhang , J. Y. Zhang , J. Z. Zhang , Jianyu Zhang , Jiawei Zhang , L. M. Zhang , L. Q. Zhang , Lei Zhang , P. Zhang , Q. Y. Zhang , Shuihan Zhang , Shulei Zhang , X. D. Zhang , X. M. Zhang , X. Y. Zhang , Xuyan Zhang , Y. Zhang , Y. Zhang , Y. T. Zhang , Y. H. Zhang , Yan Zhang , Yao Zhang , Z. H. Zhang , Z. L. Zhang , Z. Y. Zhang , Z. Y. Zhang , G. Zhao , J. Zhao , J. Y. Zhao , J. Z. Zhao , Lei Zhao , Ling Zhao , M. G. Zhao , S. J. Zhao , Y. B. Zhao , Y. X. Zhao , Z. G. Zhao , A. Zhemchugov , B. Zheng , J. P. Zheng , W. J. Zheng , Y. H. Zheng , B. Zhong , X. Zhong , H. Zhou , L. P. Zhou , X. Zhou , X. K. Zhou , X. R. Zhou , X. Y. Zhou , Y. Z. Zhou , J. Zhu , K. Zhu , K. J. Zhu , L. Zhu , L. X. Zhu , S. H. Zhu , S. Q. Zhu , T. J. Zhu , W. J. Zhu , Y. C. Zhu , Z. A. Zhu , J. H. Zou , J. Zu

We study Standard Model four-fermion production in e+ e- annihilation at LEP2 energies and above using a semi-analytical approach. We derive the complete QED initial state corrections (ISR) to the reactions e+e- -> ZZ ->…

High Energy Physics - Phenomenology · Physics 2009-10-28 Dima Bardin , Dietrich Lehner , Tord Riemann

We consider electroweak (EW) virtual corrections to $2\to 2$ fermion scattering processes mediated by a vector boson $V$ ($V=W^\pm,Z$) in the pole approximation. As is well known, the computation can be organised into factorisable and…

High Energy Physics - Phenomenology · Physics 2026-05-12 Fazila Ahmadova , Luca Buonocore , Massimiliano Grazzini , Chiara Savoini

In this paper we present two methods to evaluate non-factorizable corrections to pair-production of unstable particles. The methods are illustrated in detail for W-pair-mediated four-fermion production. The results are valid a few widths…

High Energy Physics - Phenomenology · Physics 2009-10-30 W. Beenakker , A. P. Chapovsky , F. A. Berends

We analyze new physics contributions to $e^+e^-\to W^+W^-$ at the TeV energy scale, employing an effective field theory framework. A complete basis of next-to-leading order operators in the standard model effective Lagrangian is used, both…

High Energy Physics - Phenomenology · Physics 2015-06-15 G. Buchalla , O. Cata , R. Rahn , M. Schlaffer

We derive the low-energy electroweak effective lagrangian for the case of additional heavy, unmixed, sequential fermions. Present LEP1 data still allow for the presence of a new quark and/or lepton doublet with masses greater than $M_Z/2$,…

High Energy Physics - Phenomenology · Physics 2007-05-23 S. Rigolin

We propose a strategy to compute the CKM matrix based on the conjecture, recently put forward in the literature, according to which elementary particle masses are not generated like in the standard Higgs scenario, but emerge from a…

High Energy Physics - Phenomenology · Physics 2025-02-04 Maurizio Firrotta , Giancarlo Rossi

In this paper we suggest an {\it iterative} algorithm to compute automatically the scattering matrix elements of any given effective lagrangian, $\Gamma$. By exploiting the relation between $\Gamma$ and the connected Green function…

High Energy Physics - Phenomenology · Physics 2016-09-01 F. Caravaglios , M. Moretti

We compute several total and differential cross sections relevant to top and WWZ physics at future $e^+e^-$ colliders taking into account the full set of Feynman diagrams for six fermion final states. We also include in our calculations…

High Energy Physics - Phenomenology · Physics 2009-10-30 Elena Accomando , Alessandro Ballestrero , Marco Pizzio

We present a new calculation of $W^+ W^-$ production in the semi-exclusive channel, that is either with intact outgoing protons or rapidity gaps present in the final state, and with no colour flow between the colliding protons. This study…

High Energy Physics - Phenomenology · Physics 2022-06-01 S. Bailey , L. A. Harland-Lang

We present an ab initio GW calculation to study dynamical effects on an organic compound (TMTSF)2PF6. Calculated polarized reflectivities reproduce experimental plasma edges at around 0.2 eV for E||b' and 1.0 eV for E||a. The low-energy…

Strongly Correlated Electrons · Physics 2013-09-24 Kazuma Nakamura , Shiro Sakai , Ryotaro Arita , Kazuhiko Kuroki

The complete matrix element for $e^+e^-\ar b\bar bW^+W^-$ has been computed at tree--level and applied to $Z^0H^0$ production followed by $Z^0\ar b\bar b$ and $H^0\ar W^+W^-$, keeping into account all irreducible backgrounds, which are…

High Energy Physics - Phenomenology · Physics 2009-10-28 A. Ballestrero , E. Maina , S. Moretti