Flavour and polarisation in heavy neutrino production at e+e- colliders

被引：45

作者：

del Aguila, F ^{[1
]}

Aguilar-Saavedra, JA

de la Ossa, AM

Meloni, D

机构：

[1] Univ Granada, Dept Fis Teor & Del Cosmos, E-18071 Granada, Spain

[2] Univ Granada, CAFPE, E-18071 Granada, Spain

[3] Inst Super Tecn, Dept Fis, P-1049001 Lisbon, Portugal

[4] Inst Super Tecn, CFTP, P-1049001 Lisbon, Portugal

[5] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[6] Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy

来源：

PHYSICS LETTERS B | 2005年 / 613卷 / 3-4期

关键词：

D O I：

10.1016/j.physletb.2005.03.054

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyse lW nu production at ILC, paying special attention to the role of the final lepton flavour and beam polarisation in the search for a new heavy neutrino N. We show that a sizeable coupling to the electron V-eN similar to 10(-2) is necessary to have an observable signal in any of the channels, despite the fact that the signal may be more visible in muon or tau final states. The non-observation of a heavy neutrino at ILC will improve the present upper bound on its mixing with the electron by more than one order of magnitude, V-eN <= 0.007 for m(N) between 200 and 400 GeV (c) 2005 Elsevier B.V All rights reserved.

引用

页码：170 / 180

页数：11

共 54 条

[1]

Aguilar-Saavedra JA, 2003, NUCL PHYS B, V675, P70, DOI 10.1016/nuclphysb.2003.09.055

[2]

AGUILARSAAVEDRA JA, HEPPH0106315

[3]

ALEXANDER G, DESY01011 TESLA

[4] Neutral heavy lepton production at next high energy e+e- linear colliders -: art. no. 075005 [J].

Almeida, FML ;

Coutinho, YA ;

Simoes, JAM ;

do Vale, MAB .

PHYSICAL REVIEW D, 2001, 63 (07)

[5] Models of neutrino masses and mixings [J].

Altarelli, G ;

Feruglio, F .

NEW JOURNAL OF PHYSICS, 2004, 6 :1-39

[6] MEASUREMENT OF Z'-COUPLINGS AT FUTURE HADRON COLLIDERS THROUGH DECAYS TO TAU-LEPTONS [J].

ANDERSON, JD ;

AUSTERN, MH ;

CAHN, RN .

PHYSICAL REVIEW D, 1992, 46 (01) :290-302

[7]

[Anonymous], HEPPH0412251

[8]

[Anonymous], HEPPH0404096

[9] NEW FERMIONS AT E+E- COLLIDERS .2. SIGNALS AND BACKGROUNDS [J].

AZUELOS, G ;

DJOUADI, A .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1994, 63 (02) :327-337

[10] Matter effects and CP violating neutrino oscillations with nondecoupling heavy neutrinos -: art. no. 093004 [J].

Bekman, B ;

Gluza, J ;

Holeczek, J ;

Syska, J ;

Zralek, M .

PHYSICAL REVIEW D, 2002, 66 (09)

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