Not-that-heavy Majorana neutrino signals at the LHC

被引：28

作者：

Duarte, Lucia ^{[1
]}

Peressutti, Javier ^{[2
]}

Sampayo, Oscar A. ^{[2
]}

机构：

[1] Univ Republica, Fac Ingn, Inst Fis, Julio Herrera y Reissig 565, Montevideo 11300, Uruguay

[2] UNMDP, Dept Fis, Inst Invest Fis Mar del Plata IFIMAR, CONICET, Funes 3350, RA-7600 Mar Del Plata, Buenos Aires, Argentina

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2018年 / 45卷 / 02期

关键词：

large hadron collider; Majorana neutrinos; heavy neutrino; effective field theory; new physics; MISSING TRANSVERSE-MOMENTUM; PP COLLISIONS; SEARCH; LEPTON; SUPERSYMMETRY; PHYSICS; MASSES;

D O I：

10.1088/1361-6471/aa99f5

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We revisit the possibility of Majorana neutrinos production at the large hadron collider (LHC) by studying the pp -> l(i)(+) l(j)(+) + 2 jets (l(j) equivalent to e, mu) process which, due to leptonic number violation, is a clear signature for intermediate Majorana neutrino contributions. The interactions between Majorana neutrinos and the Standard Model particles are obtained from an effective Lagrangian approach. Majorana neutrinos with masses of a few GeV are long-lived neutral particles, and we take advantage of its measurable decay length: in the same-sign dilepton channel, we exploit this fact imposing cuts that reject the SM background, and analyze the distribution corresponding to the angle between the final leptons, using a forward-backward like asymmetry to study the effects of the different gauge invariant operators. We also study the pp -> l(i)(+)nu gamma process, which is dominant for low m(N) masses if tensorial one-loop generated new physics leading to a magnetic moment for the heavy neutrinos is present. This channel provides a powerful signal that could be observed at the LHC with the aid of non-pointing photons observables and cuts on the displacement between the prompt lepton and the photon in the final state.

引用

页数：21

共 93 条

[1]

Aad G, 2017, EUR PHYS J C, V77, DOI 10.1140/epjc/s10052-017-4780-2

[2] Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at √s=8 TeV with the ATLAS detector [J].

Aad, G. ;

Abbott, B. ;

Abdallah, J. ;

Abdinov, O. ;

Aben, R. ;

Abolins, M. ;

AbouZeid, O. S. ;

Abramowicz, H. ;

Abreu, H. ;

Abreu, R. ;

Abulaiti, Y. ;

Acharya, B. S. ;

Adamczyk, L. ;

Adams, D. L. ;

Adelman, J. ;

Adomeit, S. ;

Adye, T. ;

Affolder, A. A. ;

Agatonovic-Jovin, T. ;

Aguilar-Saavedra, J. A. ;

Ahlen, S. P. ;

Ahmadov, F. ;

Aielli, G. ;

Akerstedt, H. ;

Akesson, T. P. ;

Akimoto, G. ;

Akimov, A. V. ;

Alberghi, G. L. ;

Albert, J. ;

Albrand, S. ;

Verzini, M. J. Alconada ;

Aleksa, M. ;

Aleksandrov, I. N. ;

Alexa, C. ;

Alexander, G. ;

Alexopoulos, T. ;

Alhroob, M. ;

Alimonti, G. ;

Alio, L. ;

Alison, J. ;

Alkire, S. P. ;

Allbrooke, B. M. M. ;

Allport, P. P. ;

Aloisio, A. ;

Alonso, A. ;

Alonso, F. ;

Alpigiani, C. ;

Altheimer, A. ;

Gonzalez, B. Alvarez ;

Piqueras, D. Alvarez .

PHYSICAL REVIEW D, 2015, 92 (07)

[3]

Aad G, 2015, J HIGH ENERGY PHYS, DOI 10.1007/JHEP07(2015)162

[4] Search for long-lived, weakly interacting particles that decay to displaced hadronic jets in proton-proton collisions at √s=8 TeV with the ATLAS detector [J].

Aad, G. ;

Abbott, B. ;

Abdallah, J. ;

Abdinov, O. ;

Aben, R. ;

Abolins, M. ;

AbouZeid, O. S. ;

Abramowicz, H. ;

Abreu, H. ;

Abreu, R. ;

Abulaiti, Y. ;

Acharya, B. S. ;

Adamczyk, L. ;

Adams, D. L. ;

Adelman, J. ;

Adomeit, S. ;

Adye, T. ;

Affolder, A. A. ;

Agatonovic-Jovin, T. ;

Aguilar-Saavedra, J. A. ;

Ahlen, S. P. ;

Ahmadov, F. ;

Aielli, G. ;

Akerstedt, H. ;

Akesson, T. P. A. ;

Akimoto, G. ;

Akimov, A. V. ;

Alberghi, G. L. ;

Albert, J. ;

Albrand, S. ;

Alconada Verzini, M. J. ;

Aleksa, M. ;

Aleksandrov, I. N. ;

Alexa, C. ;

Alexander, G. ;

Alexopoulos, T. ;

Alhroob, M. ;

Alimonti, G. ;

Alio, L. ;

Alison, J. ;

Alkire, S. P. ;

Allbrooke, B. M. M. ;

Allport, P. P. ;

Aloisio, A. ;

Alonso, A. ;

Alonso, F. ;

Alpigiani, C. ;

Altheimer, A. ;

Gonzalez, B. Alvarez ;

Alvarez Piqueras, D. .

PHYSICAL REVIEW D, 2015, 92 (01)

[5] Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV pp collisions at the LHC using the ATLAS detector [J].

Aad, G. ;

Abbott, B. ;

Abdallah, J. ;

Khalek, S. Abdel ;

Abdinov, O. ;

Aben, R. ;

Abi, B. ;

Abolins, M. ;

AbouZeid, O. S. ;

Abramowicz, H. ;

Abreu, H. ;

Abreu, R. ;

Abulaiti, Y. ;

Acharya, B. S. ;

Adamczyk, L. ;

Adams, D. L. ;

Adelman, J. ;

Adomeit, S. ;

Adye, T. ;

Agatonovic-Jovin, T. ;

Aguilar-Saavedra, J. A. ;

Agustoni, M. ;

Ahlen, S. P. ;

Ahmadov, F. ;

Aielli, G. ;

Akerstedt, H. ;

Akesson, T. P. A. ;

Akimoto, G. ;

Akimov, A. V. ;

Alberghi, G. L. ;

Albert, J. ;

Albrand, S. ;

Verzini, M. J. Alconada ;

Aleksa, M. ;

Aleksandrov, I. N. ;

Alexa, C. ;

Alexander, G. ;

Alexandre, G. ;

Alexopoulos, T. ;

Alhroob, M. ;

Alimonti, G. ;

Alio, L. ;

Alison, J. ;

Allbrooke, B. M. M. ;

Allison, L. J. ;

Allport, P. P. ;

Aloisio, A. ;

Alonso, A. ;

Alonso, F. ;

Alpigiani, C. .

PHYSICAL REVIEW D, 2014, 90 (11)

[6] Search for nonpointing photons in the diphoton and ETmiss final state in √s=7 TeV proton-proton collisions using the ATLAS detector [J].

Aad, G. ;

Abajyan, T. ;

Abbott, B. ;

Abdallah, J. ;

Khalek, S. Abdel ;

Abdelalim, A. A. ;

Abdinov, O. ;

Aben, R. ;

Abi, B. ;

Abolins, M. ;

AbouZeid, O. S. ;

Abramowicz, H. ;

Abreu, H. ;

Abulaiti, Y. ;

Acharya, B. S. ;

Adamczyk, L. ;

Adams, D. L. ;

Addy, T. N. ;

Adelman, J. ;

Adomeit, S. ;

Adye, T. ;

Aefsky, S. ;

Aguilar-Saavedra, J. A. ;

Agustoni, M. ;

Ahlen, S. P. ;

Ahles, F. ;

Ahmad, A. ;

Ahsan, M. ;

Aielli, G. ;

Akesson, T. P. A. ;

Akimoto, G. ;

Akimov, A. V. ;

Alam, M. A. ;

Albert, J. ;

Albrand, S. ;

Verzini, M. J. Alconada ;

Aleksa, M. ;

Aleksandrov, I. N. ;

Alessandria, F. ;

Alexa, C. ;

Alexander, G. ;

Alexandre, G. ;

Alexopoulos, T. ;

Alhroob, M. ;

Aliev, M. ;

Alimonti, G. ;

Alison, J. ;

Allbrooke, B. M. M. ;

Allison, L. J. ;

Allport, P. P. .

PHYSICAL REVIEW D, 2013, 88 (01)

[7]

Aad G, 2012, EUR PHYS J C, V72, DOI 10.1140/epjc/s10052-012-2056-4

[8]

AAD G, 2011, J HIGH ENERGY PHYS, DOI DOI 10.1007/JHEP10(2011)107

[9] Search for Majorana Neutrinos in B- → π+μ-μ- Decays [J].

Aaij, R. ;

Adeva, B. ;

Adinolfi, M. ;

Affolder, A. ;

Ajaltouni, Z. ;

Albrecht, J. ;

Alessio, F. ;

Alexander, M. ;

Ali, S. ;

Alkhazov, G. ;

Alvarez Cartelle, P. ;

Alves, A. A., Jr. ;

Amato, S. ;

Amerio, S. ;

Amhis, Y. ;

Anderlini, L. ;

Anderson, J. ;

Andreassen, R. ;

Andreotti, M. ;

Andrews, J. E. ;

Appleby, R. B. ;

Gutierrez, O. Aquines ;

Archilli, F. ;

Artamonov, A. ;

Artuso, M. ;

Aslanides, E. ;

Auriemma, G. ;

Baalouch, M. ;

Bachmann, S. ;

Back, J. J. ;

Badalov, A. ;

Balagura, V. ;

Baldini, W. ;

Barlow, R. J. ;

Barschel, C. ;

Barsuk, S. ;

Barter, W. ;

Batozskaya, V. ;

Bauer, T. ;

Bay, A. ;

Beddow, J. ;

Bedeschi, F. ;

Bediaga, I. ;

Belogurov, S. ;

Belous, K. ;

Belyaev, I. ;

Ben-Haim, E. ;

Bencivenni, G. ;

Benson, S. ;

Benton, J. .

PHYSICAL REVIEW LETTERS, 2014, 112 (13)

[10] Testing the Lorentz structure of the charged weak current in tau-decays [J].

Stahl, A ;

Voss, H .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1997, 74 (01) :73-78

← 1 2 3 4 5 6 7 8 9 10 →