Publisher’s Note: Evidence for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math>Violation in Time-Integrated<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>D</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mi>h</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>h</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:math>decay rates [Phys. Rev. Lett.<b>108</b>, 111602 (2012)]

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doi:10.1103/physrevlett.108.129903

Cited by 41 publications

(62 citation statements)

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“…CP would have turned out as large as suggested by the central value of some (statistically unsignificant) earlier measurements [8,9], we would clearly need category (3) in order to explain that, i.e. penguin diagrams that are enhanced in magnitude, see e.g.…”

Section: If the Value Of ∆A Dirmentioning

confidence: 84%

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The emergence of the ΔU = 0 rule in charm physics

Grossman

Schacht

2019

J. High Energ. Phys.

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We discuss the implications of the recent discovery of CP violation in two-body SCS D decays by LHCb. We show that the result can be explained within the SM without the need for any large SU (3) breaking effects. It further enables the determination of the imaginary part of the ratio of the ∆U = 0 over ∆U = 1 matrix elements in charm decays, which we find to be (0.65 ± 0.12). Within the standard model, the result proves the non-perturbative nature of the penguin contraction of tree operators in charm decays, similar to the known non-perturbative enhancement of ∆I = 1/2 over ∆I = 3/2 matrix elements in kaon decays, that is, the ∆I = 1/2 rule. As a guideline for future measurements, we show how to completely solve the most general parametrization of the D → P + P − system. *

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Section: If the Value Of ∆A Dirmentioning

confidence: 84%

“…In a recent spectacular result, LHCb discovered direct CP violation in charm decays at 5.3σ [1]. The new world average of the difference of CP asymmetries [2][3][4][5][6][7][8][9][10][11][12][13]…”

Section: Introductionmentioning

confidence: 99%

The emergence of the ΔU = 0 rule in charm physics

Grossman

Schacht

2019

J. High Energ. Phys.

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“…In 2011, experimental evidence for ∆A CP [11] prompted several related studies [4,5,8,[12][13][14]. We provide an update to some of the relevant results, taking into account the recent discovery with a central value smaller by a factor of ∼ 4 as well as all applicable existing bounds.…”

Section: Introduction To ∆A Cpmentioning

confidence: 95%

Implications of the LHCb discovery of CP violation in charm decays

Dery

Nir

2019

J. High Energ. Phys.

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“…Based on 0.62 fb −1 of 2011 data, in 2012 the LHCb Collaboration has reported a result of a nonzero value for the difference between the time-integrated CP asymmetries of the decays D 0 → K + K − and D 0 → π + π − [1] ∆A CP ≡ a CP (K + K − ) − a CP (π + π − ) = −(0.82 ± 0.21 ± 0.11)% (LHCb2012).…”

Section: Introductionmentioning

confidence: 99%

“…It is most important to explore whether the first observation of CP violation in the charm sector (4) is consistent with the standard model or not. 1 A common argument against the SM interpretation of Eq. (4) goes as follows.…”

Section: Introductionmentioning

confidence: 99%

Revisiting CP violation in D→PP and VP decays

Cheng

Chiang

2019

Phys. Rev. D

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Direct CP violation in the hadronic charm decays provides a good testing ground for the Kobayashi-Maskawa mechanism in the Standard Model. Any significant deviations from the expectation would be indirect evidence of physics beyond the Standard Model. In view of improved measurements from LHCb and BESIII experiments, we re-analyze the Cabibbo-favored D → PP and VP decays in the topological diagram approach. By assuming certain SU(3)-breaking effects in the tree-type amplitudes, we make predictions for both branching fractions and CP asymmetries of the singly Cabibbo-suppressed decay modes. While the color-allowed and -suppressed amplitudes are preferred to scale by the factor dictated by factorization in the PP modes, no such scaling is required in the VP modes. The W -exchange amplitudes are found to change by 10% to 50% and depend on whether dd or ss pair directly emerges from W -exchange. The predictions of branching fractions are generally improved after these SU(3) symmetry breaking effects are taken into account. We show in detail how the tree-type, QCD-penguin, and weak penguin-annihilation diagrams contribute and modify CP asymmetry predictions. Future measurements of sufficiently many direct CP asymmetries will be very useful in removing a discrete ambiguity in the strong phases as well as discriminating among different theory approaches. In particular, we predict a CP (K + K − ) − a CP (π + π − ) = (−1.14 ± 0.26) × 10 −3 or (−1.25 ± 0.25) × 10 −3 , consistent with the latest data, and a CP (K + K * − ) − a CP (π + ρ − ) = (−1.52 ± 0.43) × 10 −3 , an attractive and measurable observable in the near future. Moreover, we observe that such CP asymmetry differences are dominated by long-distance penguin-exchange through final-state rescattering.

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Publisher’s Note: Evidence forCPViolation in Time-IntegratedD0→h−h+decay rates [Phys. Rev. Lett.108, 111602 (2012)]

Cited by 41 publications

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The emergence of the ΔU = 0 rule in charm physics

The emergence of the ΔU = 0 rule in charm physics

Implications of the LHCb discovery of CP violation in charm decays

Revisiting CP violation in D→PP and VP decays

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