Search for sterile neutrinos decaying into pions at the LHC

Dib, Claudio O.; Yuan, X.; Kim, C. S.; Neill, Nicolás A.

doi:10.1103/physrevd.97.035022

Cited by 26 publications

(19 citation statements)

References 96 publications

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“…For heavy neutrinos that are produced in W boson decays, the sensitivity is only marginally increased when lowering trigger thresholds, i.e., point iii), because most µ ± from the primary vertex have p T > 25 GeV due to the mass of the W boson. It remains well below what can be achieved in proton collisions at the LHC [76,[78][79][80][81][83][84][85][86][87][88][89][90][91][92].…”

Section: Resultsmentioning

confidence: 79%

New long-lived particle searches in heavy-ion collisions at the LHC

et al. 2020

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We show that heavy ion collisions at the LHC provide a promising environment to search for signatures with displaced vertices in well-motivated New Physics scenarios. Compared to proton collisions, they offer several advantages, i) the number of parton level interactions per collision is larger, ii) there is no pile-up, iii) the lower instantaneous luminosity compared to proton collisions allows to operate the LHC experiments with very loose triggers, and iv) there are new production mechanisms that are absent in proton collisions. In the present work we focus on the third point and show that the modification of the triggers alone can increase the number of observable events by orders of magnitude if the long lived particles are predominantly produced with low transverse momentum. Our results show that collisions of ions lighter than lead are well-motivated from the viewpoint of searches for New Physics. We illustrate this for the example of heavy neutrinos in the Neutrino Minimal Standard Model.

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Section: Resultsmentioning

confidence: 79%

New long-lived particle searches in heavy-ion collisions at the LHC

et al. 2020

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“…The Majorana nature of the neutrinos can be established by detection of LNV processes, such as neutrinoless double beta decay (0νββ) [1], by specific scattering processes [2,3], by LNV rare decays of hadrons (usually mesons) [4][5][6][7][8][9][10][11][12], τ's [12][13][14], and heavy gauge bosons W [15] and Z [16]. In most of these processes, the analogous LNC channels also occur (cf.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity bounds on heavy neutrino mixing |UμN|2 and |Uτ
Cvetič
¹
,
Kim²
2019
Phys. Rev. D
Self Cite
26
1
13
0
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Decays of heavy pseudoscalar mesons B, B c , B s , and D s at the LHCb upgrade are considered, which produce either two equal sign muons or taus. In addition, we consider the analogous decays with opposite sign muons or taus. All these decays are considered to be mediated by a heavy on-shell neutrino N. Such decays of B mesons, if not detected, will give, in general, stringent upper bounds on the heavy-light mixing parameter jU μN j 2 as a function of the neutrino mass M N ∼ 1 GeV, principally due to the large expected number of produced mesons B. While some of the decays of the other mentioned mesons are attractive due to a weaker Cabibbo-Kobayashi-Maskawa suppression, the expected produced number of such mesons is significantly smaller that of B's; therefore, the sensitivity bounds from such decays are, in general, comparable or less restrictive. When τ pairs are produced, only two types of such decays are significant: B AE , B AE c → τ AE τ AE π ∓ (and τ AE τ ∓ π AE), giving us stringent upper bounds on jU τN j 2 ; the other decays with a pair of τ, such as B 0 → D ðÃÞ− τ þ τ þ π − (and D ðÃÞ− τ þ τ − π þ), are prohibited or very suppressed by kinematics.

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“…The decay modes with final leptons as muons instead of electrons or tau particles are the most promising decay modes [56].…”

Section: Cases Where Mass Of Sterile Neutrino(n) Is Less Than the Mas...mentioning

confidence: 99%

LHC signatures of sterile neutrinos in a minimal radiative extended seesaw framework

Patra,

Patel,

Sahu

2022

Preprint

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The presence of small neutrino masses and flavour mixings can be accounted for naturally in various models about extensions of the standard model, particularly in the Seesaw Mechanism models. In this work, we present a minimally extended seesaw framework with two right-handed neutrinos, where the active neutrino masses are derived in the radiative regime. Using the framework it can be shown that within certain mass limits, the light neutrino mass term can approach a form that is similar to its form under type-I Seesaw Mechanism. Apart from this, we show that the decay width of right-handed neutrinos (produced through the decay of W boson in a particle collider) is short enough to cause a sufficiently long lifetime for the particles, thus ensuring an observable displacement in the LHC between the production and decay vertices. We comment on the fact that these displaced vertex signatures thus can serve as a means to verify the existence of these righthanded neutrinos in future experiments. Lastly, we line up the possibility of our future work where the vertex signatures of particles greater than the mass of W boson can be worked upon.

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Search for sterile neutrinos decaying into pions at the LHC

Cited by 26 publications

References 96 publications

New long-lived particle searches in heavy-ion collisions at the LHC

New long-lived particle searches in heavy-ion collisions at the LHC

Sensitivity bounds on heavy neutrino mixing |UμN|2 and |Uτ
Cvetič
¹
,
Kim²
2019
Phys. Rev. D
Self Cite
26
1
13
0
View full text Add to dashboard Cite

LHC signatures of sterile neutrinos in a minimal radiative extended seesaw framework

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Search for sterile neutrinos decaying into pions at the LHC

Cited by 26 publications

References 96 publications

New long-lived particle searches in heavy-ion collisions at the LHC

New long-lived particle searches in heavy-ion collisions at the LHC

Sensitivity bounds on heavy neutrino mixing |UμN|2 and |UτCvetič1, Kim2 2019Phys. Rev. DSelf Cite261130View full textAdd to dashboardCite

LHC signatures of sterile neutrinos in a minimal radiative extended seesaw framework

Contact Info

Product

Resources

About

Sensitivity bounds on heavy neutrino mixing |UμN|2 and |Uτ
Cvetič
¹
,
Kim²
2019
Phys. Rev. D
Self Cite
26
1
13
0
View full text Add to dashboard Cite