Impacts of radiative corrections on measurements of lepton flavour universality in $${B} \rightarrow {D} \ell {{\nu } _\ell } $$ B→Dℓνℓ decays
Abstrak
Abstract Radiative corrections to $${B} \rightarrow {D} \ell {{\nu } _\ell } $$ B→Dℓνℓ decays may have an impact on predictions and measurements of the lepton flavour universality observables $$\mathcal {R}({{D} ^+})$$ R(D+) and $$\mathcal {R}({{D} ^0})$$ R(D0) . In this paper, a comparison between recent calculations of the effect of soft-photon corrections on $$\mathcal {R}({{D} ^+})$$ R(D+) and $$\mathcal {R}({{D} ^0})$$ R(D0) , and corrections generated by the widely used package Photos is given. The impact of long-distance Coulomb interactions, which are not simulated in Photos, is discussed. Furthermore, the effect of high-energy photon emission is studied through pseudo-experiments in an LHCb-like environment. It is found that over- or underestimating these emissions can cause a bias on $$\mathcal {R}({D})$$ R(D) as high as 7%. However, this bias depends on individual analyses, and future high precision measurements require an accurate evaluation of these QED corrections.
Topik & Kata Kunci
Penulis (4)
Stefano Calí
Suzanne Klaver
Marcello Rotondo
Barbara Sciascia
Akses Cepat
PDF tidak tersedia langsung
Cek di sumber asli →- Tahun Terbit
- 2019
- Sumber Database
- DOAJ
- DOI
- 10.1140/epjc/s10052-019-7254-x
- Akses
- Open Access ✓