Exclusive chromomagnetism in heavy-to-light FCNCs

2012/12/31 by Maria Dimou, James Lyon, Roman Zwicky · 3 citations
Mathematics · Physics and Astronomy · #Algorithm #Black Holes and Theoretical Physics #Factorization #Function (biology) #Geometry #Interpretation (philosophy) #Light cone #Mathematics #Matrix (chemical analysis) #Meson #Operator (biology) #Particle physics #Particle physics theoretical and experimental studies #Physics #QCD sum rules #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Sum rule in quantum mechanics #Twist #hep-ph

paper · pdf · doi:10.1103/physrevd.87.074008

55 pages, 11 figures, nearly identical to published version in PRD

openalex publication_date 2013/04/08 · arxiv created 2013/06/05 · arxiv updated 2013/06/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We compute matrix elements of the chromomagnetic operator, often denoted by O₈, between B/D states and light mesons plus an off-shell photon by employing the method of light-cone sum rules at leading twist-2. These matrix elements are relevant for processes such as B\ensuremath→K^*l⁺l^\ensuremath- and they can be seen as the analogues of the well-known penguin form factors T_1,2,3 and f_T. We find a large CP-even phase for which we give a long-distance interpretation. We compare our results to QCD factorization for which the spectator photon emission is end-point divergent. The analytic structure of the correlation function used in our method admits a complex anomalous threshold on the physical sheet. The meaning and handling within the sum rule approach of the anomalous threshold is discussed.

Citations

• B(s), D(s)→ π, K, η, ρ, K*, ω, ϕ TRANSITION FORM FACTORS AND DECAY RATES WITH EXTRACTION OF THE CKM PARAMETERS |Vub|, |Vcs|, |Vcd|
• Review of Particle Physics
• B→Vγbeyond QCD factorization
• Time-dependent CP asymmetry in B→K∗γ as a (quasi)null test of the Standard Model
• Two-loop virtual corrections to B→Xsℓ+ℓ− in the standard model
• Über Eigenschaften von Ausbreitungsfunktionen und Renormierungskonstanten quantisierter Felder
• QCD factorization for exclusive non-leptonic B-meson decays: general arguments and the case of heavy–light final states
• Automated one-loop calculations in four and D dimensions
• |Vtd/Vts| fromB→Vγ

Cited by

• Rare radiative charm decays within the standard model and beyond
• Round table: Flavour anomalies inb→sl+l−processes
• Study of the weak annihilation contributions in charmless \varvecB_s→ VV B s → V V decays