Probing the seesaw mechanism at the 250 GeV ILC

Das, Arindam; Okada, Nobuchika; Okada, Satomi; Raut, Digesh

doi:10.1016/j.physletb.2019.134849

Title: Probing the seesaw mechanism at the 250 GeV ILC

Abstract

We consider a gauged U(1)B–L (Baryon-minus-Lepton number) extension of the Standard Model (SM), which is anomaly-free in the presence of three Right-Handed Neutrinos (RHNs). Associated with the U(1)B–L symmetry breaking the RHNs acquire their Majorana masses and then play the crucial role to generate the neutrino mass matrix by the seesaw mechanism. Towards the experimental confirmation of the seesaw mechanism, we investigate a RHN pair production through the U(1)B–L gauge boson (Z′) at the 250 GeV International Linear Collider (ILC). The Z′ gauge boson has been searched at the Large Hadron Collider (LHC) Run-2 and its production cross section is already severely constrained. The constraint will become more stringent by the future experiments with the High-Luminosity upgrade of the LHC (HL-LHC). We find a possibility that even after a null Z′ boson search result at the HL-LHC, the 250 GeV ILC can search for the RHN pair production through the final state with same-sign dileptons plus jets, which is a “smoking-gun” signature from the Majorana nature of RHNs. In addition, some of RHNs are long-lived and leave a clean signature with a displaced vertex. Therefore, the 250 GeV ILC can operate as not only a Higgs Factory but also amore »« less

Authors:

; Okada, Nobuchika; Okada, Satomi; Raut, Digesh

Publication Date:: Tue Oct 01 00:00:00 EDT 2019

Research Org.:: Univ. of Alabama, Tuscaloosa, AL (United States); Univ. of Delaware, Newark, DE (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1557892

Alternate Identifier(s):: OSTI ID: 1802519

Grant/Contract Number:: SC0013680; SC0013880

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 797 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; Physics

Citation Formats


                    Das, Arindam, Okada, Nobuchika, Okada, Satomi, and Raut, Digesh. Probing the seesaw mechanism at the 250 GeV ILC.  Netherlands: N. p., 2019. 
Web.  doi:10.1016/j.physletb.2019.134849.

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                    Das, Arindam, Okada, Nobuchika, Okada, Satomi, & Raut, Digesh. Probing the seesaw mechanism at the 250 GeV ILC.  Netherlands.  https://doi.org/10.1016/j.physletb.2019.134849

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                    Das, Arindam, Okada, Nobuchika, Okada, Satomi, and Raut, Digesh. Tue .  
"Probing the seesaw mechanism at the 250 GeV ILC".  Netherlands.  https://doi.org/10.1016/j.physletb.2019.134849.

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@article{osti_1557892,

  title        = {Probing the seesaw mechanism at the 250 GeV ILC},

  author       = {Das, Arindam and Okada, Nobuchika and Okada, Satomi and Raut, Digesh},

  abstractNote = {We consider a gauged U(1)B–L (Baryon-minus-Lepton number) extension of the Standard Model (SM), which is anomaly-free in the presence of three Right-Handed Neutrinos (RHNs). Associated with the U(1)B–L symmetry breaking the RHNs acquire their Majorana masses and then play the crucial role to generate the neutrino mass matrix by the seesaw mechanism. Towards the experimental confirmation of the seesaw mechanism, we investigate a RHN pair production through the U(1)B–L gauge boson (Z′) at the 250 GeV International Linear Collider (ILC). The Z′ gauge boson has been searched at the Large Hadron Collider (LHC) Run-2 and its production cross section is already severely constrained. The constraint will become more stringent by the future experiments with the High-Luminosity upgrade of the LHC (HL-LHC). We find a possibility that even after a null Z′ boson search result at the HL-LHC, the 250 GeV ILC can search for the RHN pair production through the final state with same-sign dileptons plus jets, which is a “smoking-gun” signature from the Majorana nature of RHNs. In addition, some of RHNs are long-lived and leave a clean signature with a displaced vertex. Therefore, the 250 GeV ILC can operate as not only a Higgs Factory but also a RHN discovery machine to explore the origin of the Majorana neutrino mass generation, namely the seesaw mechanism.},

  doi          = {10.1016/j.physletb.2019.134849},

  journal      = {Physics Letters B},

  number       = C,

  volume       = 797,

  place        = {Netherlands},

  year         = {Tue Oct 01 00:00:00 EDT 2019},

  month        = {Tue Oct 01 00:00:00 EDT 2019}

}

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Title: Probing the seesaw mechanism at the 250 GeV ILC

Abstract

Citation Formats

Dirac neutrinos from a second Higgs doublet journal, November 2009

Gauging symmetries and the number of right-handed neutrinos journal, May 2009

Z ′ -portal right-handed neutrino dark matter in the minimal U ( 1 ) X extended Standard Model journal, February 2017

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Neutrino masses and the scale of B-L violation journal, September 1981

Z ′ gauge bosons at the Fermilab Tevatron journal, November 2004

Z B L ′ portal dark matter and LHC Run-2 results journal, April 2016

Cold dark matter from heavy right-handed neutrino mixing journal, October 2009

Displaced vertex signature of type-I seesaw model journal, August 2018

TeV-scale seesaw from a multi-Higgs model journal, August 2010

Neutrino masses, neutral vector bosons and the scale of B−L breaking journal, September 1991

Horizontal Symmetry and Masses of Neutrinos journal, September 1980

Heavy Majorana neutrino pair productions at the LHC in minimal U(1) extended Standard Model journal, August 2018

A new two Higgs doublet model journal, November 2007

Higgs portal dark matter in the minimal gauged U ( 1 ) B − L model journal, July 2010

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Z ′ Portal Dark Matter in the Minimal B - L Model journal, July 2018

First Measurement of Electron Neutrino Appearance in NOvA journal, April 2016

Neutrino Mass and Spontaneous Parity Nonconservation journal, April 1980

Combined Analysis of Neutrino and Antineutrino Oscillations at T2K journal, April 2017

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Split two-Higgs-doublet model and neutrino condensation journal, November 2006

Quark-lepton symmetry and B − L as the U(1) generator of the electroweak symmetry group journal, April 1980

New avenues to heavy right-handed neutrinos with pair production at hadronic colliders journal, April 2016

Naturally Small Seesaw Neutrino Mass with No New Physics Beyond the TeV Scale journal, March 2001

Large mixing angle MSW and atmospheric neutrinos from single right-handed neutrino dominance and U(1) family symmetry journal, June 2000

Local B − L Symmetry of Electroweak Interactions, Majorana Neutrinos, and Neutron Oscillations journal, May 1980

B-L violating proton decay and late cosmological baryon production journal, September 1982

Unbroken B – L symmetry journal, December 2014

Spontaneous breaking of global B − L symmetry and matter-antimatter oscillations in grand unified theories journal, January 1983

Cosmological sign of neutrino CP violation journal, November 2002

Dirac neutrinos from a second Higgs doublet
journal, November 2009

Gauging symmetries and the number of right-handed neutrinos
journal, May 2009

$Z^{'}$ -portal right-handed neutrino dark matter in the minimal ${U (1)}_{X}$ extended Standard Model
journal, February 2017

Enhanced pair production of heavy Majorana neutrinos at the LHC
journal, June 2018

Neutrino masses and the scale of B-L violation
journal, September 1981

$Z^{'}$ gauge bosons at the Fermilab Tevatron
journal, November 2004

$Z_{B L}^{'}$ portal dark matter and LHC Run-2 results
journal, April 2016

Cold dark matter from heavy right-handed neutrino mixing
journal, October 2009

Displaced vertex signature of type-I seesaw model
journal, August 2018

TeV-scale seesaw from a multi-Higgs model
journal, August 2010

Neutrino masses, neutral vector bosons and the scale of B−L breaking
journal, September 1991

Horizontal Symmetry and Masses of Neutrinos
journal, September 1980

Heavy Majorana neutrino pair productions at the LHC in minimal U(1) extended Standard Model
journal, August 2018

A new two Higgs doublet model
journal, November 2007

Higgs portal dark matter in the minimal gauged $U (1)_{B − L}$ model
journal, July 2010

μ→eγ at a rate of one out of 109 muon decays?
journal, April 1977

$Z^{'}$ Portal Dark Matter in the Minimal $B - L$ Model
journal, July 2018

First Measurement of Electron Neutrino Appearance in NOvA
journal, April 2016

Neutrino Mass and Spontaneous Parity Nonconservation
journal, April 1980

Combined Analysis of Neutrino and Antineutrino Oscillations at T2K
journal, April 2017

Neutrino masses in SU(2) ⊗ U(1) theories
journal, November 1980

Split two-Higgs-doublet model and neutrino condensation
journal, November 2006

Quark-lepton symmetry and B − L as the U(1) generator of the electroweak symmetry group
journal, April 1980

New avenues to heavy right-handed neutrinos with pair production at hadronic colliders
journal, April 2016

Naturally Small Seesaw Neutrino Mass with No New Physics Beyond the TeV Scale
journal, March 2001

Large mixing angle MSW and atmospheric neutrinos from single right-handed neutrino dominance and U(1) family symmetry
journal, June 2000

Local $B - L$ Symmetry of Electroweak Interactions, Majorana Neutrinos, and Neutron Oscillations
journal, May 1980

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journal, September 1982

Unbroken B – L symmetry
journal, December 2014

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Cosmological sign of neutrino CP violation
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