Workshop summary: Kaons@CERN 2023 Anzivino, G.; Cuendis, Sergio Arguedas; Bernard, V. ...
The European physical journal. C, Particles and fields,
04/2024, Letnik:
84, Številka:
4
Journal Article
Recenzirano
Odprti dostop
Kaon physics is at a turning point – while the rare-kaon experiments NA62 and KOTO are in full swing, the end of their lifetime is approaching and the future experimental landscape needs to be ...defined. With HIKE, KOTO-II and LHCb-Phase-II on the table and under scrutiny, it is a very good moment in time to take stock and contemplate about the opportunities these experiments and theoretical developments provide for particle physics in the coming decade and beyond. This paper provides a compact summary of talks and discussions from the Kaons@CERN 2023 workshop, held in September 2023 at CERN.
Kaon physics is at a turning point -- while the rare-kaon experiments NA62 and KOTO are in full swing, the end of their lifetime is approaching and the future experimental landscape needs to be ...defined. With HIKE, KOTO-II and LHCb-Phase-II on the table and under scrutiny, it is a very good moment in time to take stock and contemplate about the opportunities these experiments and theoretical developments provide for particle physics in the coming decade and beyond. This paper provides a compact summary of talks and discussions from the Kaons@CERN 2023 workshop.
A model that can simultaneously explain Dark Matter relic density and the apparent matter anti-matter imbalance of the universe has been recently proposed. The model requires
b
-hadron branching ...fractions to Dark Matter at the per mille level. The
b
-hadrons decay to a dark sector baryon,
ψ
DS
, which has a mass in the region
940
MeV
/
c
2
≤
m
ψ
DS
≤
4430
MeV
/
c
2
. In this paper, we discuss the sensitivity of the LHCb experiment to search for this dark baryon, covering different types of topology and giving prospects for Runs 3 and 4 of the LHC, as well as for the proposed Upgrade II. We show that the LHCb experiment can cover the entire mass range of the hypothetical dark baryon.
This article reviews the most recent measurements of B(s)0 → μ+μ− decay properties at the Large Hadron Collider (LHC) which are the most precise to date. The measurements of the branching fraction ...and effective lifetime of the Bs0 → μ+μ− decay by the ATLAS, CMS, and LHCb collaborations, as well as the search for B0 → μ+μ− decays, are summarized with a focus on the experimental challenges. Furthermore, prospects are given for these measurements and new observables that become accessible with the foreseen amounts of data by the end of the LHC.
A
bstract
This paper reports a study of the experimental signatures of hierarchical sectors beyond the Standard Model characterized by a flavour-violating heavy vector and a set of light ...pseudo-Goldstone bosons
a
1,2
, spanning a large range of lifetimes. The non-minimal scalar spectrum triggers novel
B
decays into multiple leptons that would have escaped the reach of current searches. Novel displaced vertex analyses at LHCb are therefore discussed to probe the hierarchical new physics, extending the scope of the tracking system of the detector. Additionally, the reach of the proposed CODEX-b experiment is studied. By exploiting the use of tracks only reconstructed in subsystems of the detector at the high-level LHCb trigger,
ℬ
B
s
0
→
a
1
a
2
<
10
−
8
and ℬ(
B
+
→
K
+
a
1
a
2
) < 10
−9
could be reached in the muon channel across seven orders of magnitude in the lifetime of the Goldstone bosons. Correspondingly, heavy-light particle couplings of order ≲ 1 could be tested, potentially ruling out composite Higgs scenarios where the heavy and light sectors couple strongly.
This article reviews the most recent measurements of B(s)0 → μ+μ− decay properties at the Large Hadron Collider (LHC) which are the most precise to date. The measurements of the branching fraction ...and effective lifetime of the Bs0 → μ+μ− decay by the ATLAS, CMS, and LHCb collaborations, as well as the search for B0 → μ+μ− decays, are summarized with a focus on the experimental challenges. Furthermore, prospects are given for these measurements and new observables that become accessible with the foreseen amounts of data by the end of the LHC.
This article reviews the most recent measurements of Bsub.(s) sup.0 → μsup.+μsup.− decay properties at the Large Hadron Collider (LHC) which are the most precise to date. The measurements of the ...branching fraction and effective lifetime of the Bsub.s sup.0 → μsup.+μsup.− decay by the ATLAS, CMS, and LHCb collaborations, as well as the search for Bsup.0 → μsup.+μsup.− decays, are summarized with a focus on the experimental challenges. Furthermore, prospects are given for these measurements and new observables that become accessible with the foreseen amounts of data by the end of the LHC.
Abstract
A model that can simultaneously explain Dark Matter relic density and the apparent matter anti-matter imbalance of the universe has been recently proposed. The model requires
b
-hadron ...branching fractions to Dark Matter at the per mille level. The
b
-hadrons decay to a dark sector baryon,
$$\psi _{\mathrm{DS}}$$
ψ
DS
, which has a mass in the region
$$940 ~\mathrm{MeV}/c^2\le m_{\psi _{\mathrm{DS}}}\le 4430~\mathrm{MeV}/c^2$$
940
MeV
/
c
2
≤
m
ψ
DS
≤
4430
MeV
/
c
2
. In this paper, we discuss the sensitivity of the LHCb experiment to search for this dark baryon, covering different types of topology and giving prospects for Runs 3 and 4 of the LHC, as well as for the proposed Upgrade II. We show that the LHCb experiment can cover the entire mass range of the hypothetical dark baryon.
In the extensive efforts to understand the nature of Dark Matter and searches at colliders, the LHCb experiment has a unique sensitivity to low mass Dark Matter candidates. These proceedings present ...recent results and prospects on Dark Matter searches with the LHCb experiment that achieve world-leading sensitivities.
A review of the experimental status of purely leptonic \({B^0_{s}\to\ell^+\ell^-}\) decays is given and the new analysis of \({B^0_{s}\to\mu^+\mu^-}\) observables with the LHCb experiment is ...presented. The new results are the most precise single experiment measurements of the quantities to date and are consistent with the Standard Model. However, they also match the recent anomalies found in \(b\to s\ell\ell\) transitions excellently.
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