Light neutralinos at CERN LHC in cosmologically inspired scenarios: New benchmarks in the search for supersymmetry

被引：27

作者：

Bottino, A. ^{[1
]}

Fornengo, N. ^{[1
]}

Polesello, G. ^{[2
]}

Scopel, S. ^{[3
]}

机构：

[1] Ist Nazl Fis Nucl, Dipartimento Fis Teor, Sez Torino, I-10125 Turin, Italy

[2] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[3] Korea Inst Adv Study, Seoul 130722, South Korea

来源：

PHYSICAL REVIEW D | 2008年 / 77卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.77.115026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study how the properties of the four neutralino states, chi(i) (i = 1, 2, 3, 4), can be investigated at the Large Hadron Collider (LHC), in the case when the lightest one, chi(1), has a mass m(chi) less than or similar to 50 GeV and is stable. This situation arises naturally in supersymmetric models where gaugino masses are not unified at a grand unified (GUT) scale and R-parity is conserved. The main features of these neutralino states are established by analytical and numerical analyses, and two scenarios are singled out on the basis of the cosmological properties required for the relic neutralinos. Signals expected at LHC are discussed through the main chain processes started by a squark, produced in the initial proton-proton scattering. We motivate the selection of some suitable benchmarks, in light of the spectroscopical properties (mass spectrum and transitions) of the four neutralino states. Branching ratios and the expected total number of events are derived in the various benchmarks, and their relevance for experimental determination of neutralino properties is finally discussed.

引用

页数：13

共 33 条

[1] Search for pair production of scalar bottom quarks in p(p)over-bar collisions at √s = 1.96 TeV [J].

Abazov, V. M. ;

Abbott, B. ;

Abolins, M. ;

Acharya, B. S. ;

Adams, M. ;

Adams, T. ;

Agelou, M. ;

Ahn, S. H. ;

Ahsan, M. ;

Alexeev, G. D. ;

Alkhazov, G. ;

Alton, A. ;

Alverson, G. ;

Alves, G. A. ;

Anastasoaie, M. ;

Andeen, T. ;

Anderson, S. ;

Andrieu, B. ;

Anzelc, M. S. ;

Arnoud, Y. ;

Arov, M. ;

Askew, A. ;

Asman, B. ;

Jesus, A. C. S. Assis ;

Atramentov, O. ;

Autermann, C. ;

Avila, C. ;

Ay, C. ;

Badaud, F. ;

Baden, A. ;

Bagby, L. ;

Baldin, B. ;

Bandurin, D. V. ;

Banerjee, P. ;

Banerjee, S. ;

Barberis, E. ;

Bargassa, P. ;

Baringer, P. ;

Barnes, C. ;

Barreto, J. ;

Bartlett, J. F. ;

Bassler, U. ;

Bauer, D. ;

Bean, A. ;

Begalli, M. ;

Begel, M. ;

Belanger-Champagne, C. ;

Bellantoni, L. ;

Bellavance, A. ;

Benitez, J. A. .

PHYSICAL REVIEW LETTERS, 2006, 97 (17)

[2] Search for Bs0→μ+μ- decays at D0 [J].

Abazov, V. M. ;

Abbott, B. ;

Abolins, M. ;

Acharya, B. S. ;

Adams, M. ;

Adams, T. ;

Aguilo, E. ;

Ahn, S. H. ;

Ahsan, M. ;

Alexeev, G. D. ;

Alkhazov, G. ;

Alton, A. ;

Alverson, G. ;

Alves, G. A. ;

Anastasoaie, M. ;

Ancu, L. S. ;

Andeen, T. ;

Anderson, S. ;

Andrieu, B. ;

Anzelc, M. S. ;

Arnoud, Y. ;

Arov, M. ;

Arthaud, M. ;

Askew, A. ;

Asman, B. ;

Jesus, A. C. S. Assis ;

Atramentov, O. ;

Autermann, C. ;

Avila, C. ;

Ay, C. ;

Badaud, F. ;

Baden, A. ;

Bagby, L. ;

Baldin, B. ;

Bandurin, D. V. ;

Banerjee, S. ;

Banerjee, P. ;

Barberis, E. ;

Barfuss, A. -F. ;

Bargassa, P. ;

Baringer, P. ;

Barreto, J. ;

Bartlett, J. F. ;

Bassler, U. ;

Bauer, D. ;

Beale, S. ;

Bean, A. ;

Begalli, M. ;

Begel, M. ;

Belanger-Champagne, C. .

PHYSICAL REVIEW D, 2007, 76 (09)

[3]

ABDALLAH J, 2001, DELPHI 2001 085 C 51, P14013

[4] Search for neutral supersymmetric Higgs bosons in p(p)over-bar collisions at √s=1.8 TeV [J].

Affolder, T ;

Akimoto, H ;

Akopian, A ;

Albrow, MG ;

Amaral, P ;

Amendolia, SR ;

Amidei, D ;

Anikeev, K ;

Antos, J ;

Apollinari, G ;

Arisawa, T ;

Asakawa, T ;

Ashmanskas, W ;

Azfar, F ;

Azzi-Bacchetta, P ;

Bacchetta, N ;

Bailey, MW ;

Bailey, S ;

de Barbaro, P ;

Barbaro-Galtieri, A ;

Barnes, VE ;

Barnett, BA ;

Baroiant, S ;

Barone, M ;

Bauer, G ;

Bedeschi, F ;

Belforte, S ;

Bell, WH ;

Bellettini, G ;

Bellinger, J ;

Benjamin, D ;

Bensinger, J ;

Beretvas, A ;

Berge, JP ;

Berryhill, J ;

Bevensee, B ;

Bhatti, A ;

Binkley, M ;

Bisello, D ;

Bishai, M ;

Blair, RE ;

Blocker, C ;

Bloom, K ;

Blumenfeld, B ;

Blusk, SR ;

Bocci, A ;

Bocek, A ;

Bokhari, W ;

Bolla, G ;

Bonushkin, Y .

PHYSICAL REVIEW LETTERS, 2001, 86 (20) :4472-4478

[5] Measuring sparticle masses in non-universal string inspired models at the LHC [J].

Allanach, BC ;

Lester, CG ;

Parker, MA ;

Webber, BR .

JOURNAL OF HIGH ENERGY PHYSICS, 2000, (09) :XIII-30

[6]

[Anonymous], ARXIVHEPEX0603003 HF

[7]

[Anonymous], 991415 CERNLHCC ATLA

[8] Measurements of masses in supergravity models at CERN LHC [J].

Bachacou, H ;

Hinchliffe, I ;

Paige, FE .

PHYSICAL REVIEW D, 2000, 62 (01) :1-15

[9] Squark and gluino production at hadron colliders [J].

Beenakker, W ;

Hopker, R ;

Spira, M ;

Zerwas, PM .

NUCLEAR PHYSICS B, 1997, 492 (1-2) :51-103

[10]

Beenakker W., ARXIVHEPPH9611232

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