ALP Production in Weak Mesonic Decays

Guerrera, Alfredo Walter Mario; Rigolin, S.

doi:10.1002/prop.202200192

Cited by 12 publications

(10 citation statements)

References 178 publications

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“…Very promising results are expected in a near future from 𝐷 and 𝐵 pseudoscalar meson decays in invisible ALPs, especially from 𝐵-factories [4,6,9,11]. The analysis done in the previous section can be easily extended to heavier pseudoscalar meson decays simply replacing the corresponding valence quarks.…”

Section: Bounds On Alp-fermion Couplings From D and B Meson Decaysmentioning

confidence: 97%

“…For the general formula describing other type of hadronic meson decays in invisible ALPs (pseudoscalar to vector, vector to pseudoscalar and vector to vector) the reader is deferred to [11].…”

Section: Meson Hadronization In Flavor Changing Processesmentioning

confidence: 99%

“…Therefore, beam experiments are complementary in the exploration of the ALP couplings parameter space, and, among them, flavor factories are the most promising ones. Flavor physics experiments have received more and more attention from the phenomenological community [4,[6][7][8][9][10][11]. Strong limits on the ALP couplings in Eq.…”

Section: Introductionmentioning

confidence: 99%

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Meson decays in invisible ALP

Rigolin,

Mario Guerrera

2023

Proceedings of Corfu Summer Institute 2022 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2022)

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Axion-Like-Particles are among the most economical and well motivated extensions of the Standard Model. In this talk ALP production from hadronic meson decays are presented. The general description of the hadronization techniques needed in order to calculate ALP emission in mesonic s-and t-channel tree-level processes is discussed, for pseudoscalar to pesudoscalar mesons. Accordingly, the decay amplitudes for 𝑀 𝐼 → 𝑀 𝐹 𝑎 are calculated. Finally, bounds on the (low-energy effective Lagrangian) ALP-fermion couplings are derived, from present and future flavor experiments.

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Section: Bounds On Alp-fermion Couplings From D and B Meson Decaysmentioning

confidence: 97%

Section: Meson Hadronization In Flavor Changing Processesmentioning

confidence: 99%

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Meson decays in invisible ALP

Rigolin,

Mario Guerrera

2023

Proceedings of Corfu Summer Institute 2022 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2022)

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“…As carried out in [16][17][18][19], the low-energy CP and flavorconserving (FC) effective Lagrangian for ALP-fermion interactions can be written as…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Light axion-like particles and the pseudoscalar mesonic decays M ⃗ M ′ ν ν

Dai,

Yue,

et al. 2024

Commun. Theor. Phys.

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Axion-like particle (ALP) is one kind of the best-motivated new particles. We consider its production from the pseudoscalar mesonic decays $M\to M' a$ with $M$ being a pseudoscalar meson $B$ or $K$. The upper limits on the flavor conserving (FC) ALP-quark coupling parameter $g_{u}$ are obtained by assuming ALP as an invisible particle. We find that the most severe constraint on $g_{u}$ comes from the decay $K^{+}\to \pi^{+}\nu \bar{\nu}$ for $0.05GeV \leq M_a \leq 0.35GeV$, while the decays $B^{+,0}\to K^{+,0}\nu \bar{\nu}$ and $B^{+,0}\to \pi^{+,0}\nu\bar{\nu}$ can also generate significative constraints.

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“…On the experimental side, the efforts pointed towards the construction of a consistent effective description of ALPs, [ 25–32 ] beyond the seminal study in Ref. [33], in order to investigate possible signals at low‐energy facilities, [ 34–44 ] colliders [ 25,45–61 ] and in non‐terrestrial environments. [ 62–65 ] Most of the analyses performed on collider data and from astrophysics deal with an on‐shell ALP in the initial or final state of the considered processes, such as mono‐ Z , mono‐ W , and mono‐Higgs searches or stellar cooling, and the associated bounds strongly depend on the ALP mass.…”

Section: Introductionmentioning

confidence: 99%

Probing HNL‐ALP Couplings at Colliders

Giorgi

Merlo

Tastet

2023

Fortschritte der Physik

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Axion‐like particles (ALPs) and heavy neutral leptons (HNLs) are both well‐motivated extensions of the Standard Model. As ALPs couple to on‐shell fermions proportionally to their masses, processes involving both types of particles may give rise, for TeV HNLs, to relevant phenomenology at colliders. In this work, we point out a particularly clean process, whose final state consists of four jets and two charged leptons, and we estimate its current and future sensitivity at the LHC. For on‐shell HNLs, i) there is no dependence on the overall scale of the mixing between HNLs and the active neutrinos, making this process sensitive down to the type‐I Seesaw line; ii) the signal strength of the process is sizable only as far as the HNL masses are below a few TeVs, contrary to what the proportionality to masses of the ALP couplings may suggest. Although ALPs and HNLs have been mainly studied independently in the literature, considering their interplay may lead to joint limits that are much stronger than those on the individual particles taken separately. This concise study paves the way for similar searches at colliders and other experiments.

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ALP Production in Weak Mesonic Decays

Cited by 12 publications

References 178 publications

Meson decays in invisible ALP

Meson decays in invisible ALP

Light axion-like particles and the pseudoscalar mesonic decays M ⃗ M ′ ν ν

Probing HNL‐ALP Couplings at Colliders

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