2018
DOI: 10.48550/arxiv.1806.08783
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Exploring $B\toππ, πK$ Decays at the High-Precision Frontier

Robert Fleischer,
Ruben Jaarsma,
Eleftheria Malami
et al.

Abstract: The B → ππ, πK system offers a powerful laboratory to probe strong and weak interactions. Using the isospin symmetry, we determine hadronic B → ππ parameters from data where new measurements of direct CP violation in B 0 d → π 0 π 0 resolve a discrete ambiguity. With the help of the SU (3) flavour symmetry, the B → ππ parameters can be converted into their B → πK counterparts, thereby allowing us to make predictions of observables. A particularly interesting decay is B 0 d → π 0 K S as it exhibits mixing-induc… Show more

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Cited by 11 publications
(32 citation statements)
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“…What we find is not completely unexpected in view of the previous analyses [35][36][37][38][39][40][41][42][43][44][45][46], but sheds some interesting light on the so-called puzzle. The salient features, discussed in more detail in Section IV, are as follows.…”
Section: Introductionsupporting
confidence: 79%
“…What we find is not completely unexpected in view of the previous analyses [35][36][37][38][39][40][41][42][43][44][45][46], but sheds some interesting light on the so-called puzzle. The salient features, discussed in more detail in Section IV, are as follows.…”
Section: Introductionsupporting
confidence: 79%
“…In this respect, phenomenological studies using flavour symmetries can provide valuable insights into the strong decay dynamics of pure hadronic decays and non-perturbative contributions. Specifically interesting are B → πK decays, which are dominated by QCD penguin topologies due to a CKM suppression of the tree topologies, and which were studied extensively [53,[57][58][59][60][61][62][63][64][65][66][67][68]. In fact, using an isospin relation between the neutral B → πK decays, a correlation between the direct and mixing-induced CP asymmetries of B 0 → π 0 K 0 S is found, which is in tension with the experimental data [57,58,68].…”
Section: Cp Violation In Two-body B Decaysmentioning
confidence: 97%
“…Specifically interesting are B → πK decays, which are dominated by QCD penguin topologies due to a CKM suppression of the tree topologies, and which were studied extensively [53,[57][58][59][60][61][62][63][64][65][66][67][68]. In fact, using an isospin relation between the neutral B → πK decays, a correlation between the direct and mixing-induced CP asymmetries of B 0 → π 0 K 0 S is found, which is in tension with the experimental data [57,58,68]. Interestingly, this tension has grown stronger over the years in particular due to more precise determination of γ, which emphasizes the importance of improved γ determinations for phenomenological studies.…”
Section: Cp Violation In Two-body B Decaysmentioning
confidence: 99%
“…In this context, another WET operator basis has been introduced [37] for the tree-level matching of SMEFT onto WET, called throughout the JMS basis. 5 This basis has recently been used in determination of the complete one-loop matching 6 of SMEFT onto WET [44]. Actual renormalizable UV completions are understood to be matched onto a stack of effective theories, the last two being subsequently the SMEFT and the WET.…”
Section: Introductionmentioning
confidence: 99%