New Production Mechanism for Heavy Neutrinos at the LHC

By P. S. Bhupal Dev, A. Pilaftsis, U. Yang. 2013

145 citations recorded by the source corpus.

We study a new production mechanism for heavy neutrinos at the LHC, which dominates over the usually considered s-channel W-exchange diagram for heavy-neutrino masses larger than 100?200 GeV. The new mechanism is infrared enhanced by t-channel W?-fusion processes. This has important implications for experimental tests of the seesaw mechanism of neutrino masses and, in particular, for the ongoing heavy neutrino searches at the LHC. We find that the direct collider limits on the light-to-heavy neutrino mixing can be significantly improved when this new production channel is properly taken into account. The scope of this new mechanism can be equally well extended to other exotic searches at the LHC.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e89304f45942cc703cdad9dc7f1ae1081da07b62

How researchers see this paper

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In Nuclear and High Energy Physics

1. Yi-Fu Cai
2. R. Ruiz
3. T. Han
4. F. Deppisch
5. P. Bolton
6. Tong Li
7. Daniel Alva
8. P. S. Bhupal Dev

Citations in the corpus

• Lepton Number Violation: Seesaw Models and Their Collider Tests (2017, background): “In particular, several studies have investigated the semi-inclusive, photoninitiated vector boson fusion (VBF) process [247, 254, 255, 262], shown in Figure 6C, and given by”
• Neutrinoless double beta decay versus other probes of heavy sterile neutrinos (2019, background): “As for the LNV signature at colliders, in a natural seesaw scenario with approximate lepton number conservation, the LNV amplitude for the on-shell production of heavy neutrinos at average four-momentum squared s̄ = (m2N1 +m 2 N2 )/2 can be written as [35, 80] ALNV(s̄) = V 2 `N 2∆mN ∆mN + Γ 2 N +O (”
• Heavy Majorana neutrinos from Wγ fusion at hadron colliders (2014, background): “Recently, the vector boson fusion (VBF) channel Wγ → Nl was studied at the LHC, and its t-channel enhancement to the total cross section was emphasized [36].”