Abstract
We analyze the impact of electron and positron beam polarization on radiative neutralino production at the international linear collider (ILC). We focus on three different mSUGRA scenarios in turn at the Higgs strahlung threshold, the top pair production threshold, and at \(\sqrt{s} =\)500 GeV. In these scenarios at the corresponding \(\sqrt{s}\), radiative neutralino production is the only supersymmetric production mechanism that is kinematically allowed. The heavier neutralinos and charginos as well as the sleptons, squarks and gluinos are too heavy to be pair produced. We calculate the signal cross section and also the standard model background from radiative neutrino production. For our scenarios, we obtain significances larger than 10 and signal to background ratios between 2% and 5%, if we have electron beam polarization \(P_{e^-} = 0.0\)–0.8 and positron beam polarization \(P_{e^+} = 0.0\)–0.3. If we have electron beam polarization of \(P_{e^-} = 0.9\), then the signal is observable with \(P_{e^+} = 0.0\) but both the significance and the signal to background ratio are significantly improved for \(P_{e^+} = 0.3\).
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References
H.P. Nilles, Phys. Rep. 110, 1 (1984)
H.E. Haber, G.L. Kane, Phys. Rep. 117, 75 (1985)
M. Drees, hep-ph/9611409
I.J.R. Aitchison, hep-ph/0505105
LHC/LC Study Group, G. Weiglein et al., hep-ph/0410364
A. Djouadi, J. Lykken, K. Mönig, Y. Okada, M.J. Oreglia, S. Yamashita, International Linear Collider Reference Design Report Volume 2: PHYSICS AT THE ILC arXiv:0709.1893 [hep-ph]
ECFA/DESY LC Physics Working Group, J.A. Aguilar-Saavedra et al., hep-ph/0106315
American Linear Collider Working Group, T. Abe et al., hep-ex/0106055
ACFA Linear Collider Working Group, K. Abe et al., hep-ph/0109166
G.A. Moortgat-Pick et al., hep-ph/0507011; http://www.ippp.dur.ac.uk/∼gudrid/source/
Summary talk of the polarization parallel session by S. Riemann given at the ILC conference in Valencia, 5–13 November 2006, http://ific.uv.es/ ilc/ECFA-GDE2006/
Talk by G. Moortgat-Pick in the polarization parallel session at the ILC conference in Valencia, 5–13 November 2006, http://ific.uv.es/ ilc/ECFA-GDE2006/
Talk by E Reinherz-Aronis in the polarization parallel session at the ILC conference in Valencia, 5–13 November 2006, http://ific.uv.es/ ilc/ECFA-GDE2006/
G. Moortgat-Pick, hep-ph/0607173
A. Datta, A. Datta, S. Raychaudhuri, Phys. Lett. B 349, 113 (1995) [hep-ph/9411435]
A. Datta, A. Datta, S. Raychaudhuri, Eur. Phys. J. C 1, 375 (1998) [hep-ph/9605432]
S. Ambrosanio, B. Mele, G. Montagna, O. Nicrosini, F. Piccinini, Nucl. Phys. B 478, 46 (1996) [hep-ph/9601292]
H.K. Dreiner, O. Kittel, U. Langenfeld, Phys. Rev. D 74, 115010 (2006) [hep-ph/0610020]
S.Y. Choi, J.S. Shim, H.S. Song, J. Song, C. Yu, Phys. Rev. D 60, 013007 (1999) [hep-ph/9901368]
H. Baer, A. Belyaev, in Proc. of the APS/DPF/DPB Summer Study on the Future of Particle Physics (Snowmass 2001) ed. by N. Graf, eConf C010630, P336 (2001) [hep-ph/0111017]
A.H. Chamseddine, R. Arnowitt, P. Nath, Phys. Rev. Lett. 49, 970 (1982)
P. Nath, R. Arnowitt, A.H. Chamseddine, Nucl. Phys. B 227, 121 (1983); for a review see also [1].
M.T. Dova, P. Garcia-Abia, W. Lohmann, hep-ph/0302113
Particle Data Group, W.M. Yao et al., J. Phys. G 33, 1 (2006)
I. Borjanovic et al., Eur. Phys. J. C 39S2, 63 (2005) [hep-ex/0403021]
M. Martinez, R. Miquel, Eur. Phys. J. C 27, 49 (2003) [hep-ph/0207315]
J.A. Aguilar-Saavedra et al., Eur. Phys. J. C 46, 43 (2006) [hep-ph/0511344]
B.C. Allanach et al., in Proc. of the APS/DPF/DPB Summer Study on the Future of Particle Physics (Snowmass 2001) ed. by N. Graf, Snowmass, Colorado, 30 June–21 July 2001 [hep-ph/0202233]
M. Dittmar, H.K. Dreiner, Phys. Rev. D 55, 167 (1997) [hep-ph/9608317]
M. Dittmar, H.K. Dreiner, hep-ph/9703401
N. Ghodbane, H.U. Martyn, in Proc. of the APS/DPF/DPB Summer Study on the Future of Particle Physics (Snowmass 2001) ed. by N. Graf, hep-ph/0201233
W. Porod, Comput. Phys. Commun. 153, 275 (2003) [hep-ph/0301101]
T. Omori, KEK-PREPRINT-98-237, presented at the 1st ACFA Workshop on Physics Detector at the Linear Collider, Beijing, China, 26–28 November 1998
M. Drees, R. Godbole, P. Roy, Theory and phenomenology of sparticles: An account of four-dimensional N=1 supersymmetry in high energy physics (World Scientific, Hackensack, USA, 2004)
See, e.g., A. Datta, A. Kundu, A. Samanta, Phys. Rev. D 64, 095016 (2001) [hep-ph/0101034]
A. Datta, S. Maity, Phys. Lett. B 513, 130 (2001) [hep-ph/0104086]
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Dreiner, H., Kittel, O. & Langenfeld, U. The role of beam polarization for radiative neutralino production at the ILC. Eur. Phys. J. C 54, 277–284 (2008). https://doi.org/10.1140/epjc/s10052-007-0520-3
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DOI: https://doi.org/10.1140/epjc/s10052-007-0520-3