The use of quantum-correlated D0 decays for φ3 measurement

Bondar, A.; Poluektov, A.

doi:10.1140/epjc/s10052-008-0600-z

Cited by 104 publications

(137 citation statements)

References 16 publications

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“…(41) Since D decays do not violate CP one can relate c i and s i in i th bin with the CP conjugated one,ī, hence cī = c i , and sī = −s i . A MC based feasibility study showed that the optimal strategy using this model independent approach is statistically only 30% worse than the model dependent method [208,209]. The prior measurement of c i , and s i at charm factory (or at SuperB via running at charm threshold) is a crucial ingredient to measure γ in this way.…”

Section: Tests Of Cp Tmentioning

confidence: 99%

SuperB Progress Report for Physics

O’Leary¹,

Aachen²,

Matias³

et al. 2012

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SuperB is a high luminosity e + e − collider that will be able to indirectly probe new physics at energy scales far beyond the reach of any man made accelerator planned or in existence. Just as detailed understanding of the Standard Model of particle physics was developed from stringent constraints imposed by flavour changing processes between quarks, the detailed structure of any new physics is severely constrained by flavour processes. In order to elucidate this structure it is necessary to perform a number of complementary studies of a set of golden channels. With these measurements in hand, the pattern of deviations from the Standard Model behavior can be used as a test of the structure of new physics. If new physics is found at the LHC, then the many golden measurements from SuperB will help decode the subtle nature of the new physics. However if no new particles are found at the LHC, SuperB will be able to search for new physics at energy scales up to 10 − 100 TeV. In either scenario, flavour physics measurements that can be made at SuperB play a pivotal role in understanding the nature of physics beyond the Standard Model. Examples for using the interplay between measurements to discriminate New Physics models are discussed in this document.SuperB is a Super Flavour Factory, in addition to studying large samples of B u,d,s , D and τ decays, SuperB has a broad physics programme that includes spectroscopy both in terms of the Standard Model and exotica, and precision measurements of sin 2 θ W . In addition to performing CP violation measurements at the Υ (4S) and φ(3770), SuperB will test CP T in these systems, and lepton universality in a number of different processes. The multitude of rare decay measurements possible at SuperB can be used to constrain scenarios of physics beyond the Standard Model. In terms of other precision tests of the Standard Model, this experiment will be able to perform precision over-constraints of the unitarity triangle through multiple measurements of all angles and sides.

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Section: Tests Of Cp Tmentioning

confidence: 99%

SuperB Progress Report for Physics

O’Leary¹,

Aachen²,

Matias³

et al. 2012

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“…For a quasi-CP tag, the c i sensitive term is scaled by (2F + − 1) rather than 1. For the tag modes K 0 S,L π + π − [11,12], the double-tagged yield is…”

Section: Jhep01(2018)082mentioning

confidence: 99%

Quantum-correlated measurements of D → K S 0 π+π−π0 decays and consequences for the determination of the CKM angle γ

Resmi

Libby

Malde

et al. 2018

J. High Energ. Phys.

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We perform quantum-correlated measurements of the decay D → K 0 S π + π − π 0 using a data sample corresponding to an integrated luminosity of 0.82 fb −1 collected at the ψ(3770) resonance by the CLEO-c detector. The value of the CP -even fraction F + is determined to be 0.238 ± 0.012 ± 0.012. The strong-phase differences are also measured in different regions of K 0 S π + π − π 0 phase space by binning around the intermediate resonances present. The potential sensitivity of the results for determining the CKM angle γ from B ± → D(K 0 S π + π − π 0 )K ± decays is also discussed.

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“…However, to better exploit the information available in multi-body D decays, the phase space can be divided into bins such that regions of constructive and destructive interference do not dilute each other. Such a method has already been applied to the K 0 S π + π − final state [21] which gives the best single measurement of γ to date [22]; here an amplitude-model was used to group regions of phase space that have a similar phase difference between D 0 → K 0 S π + π − and D 0 → K 0 S π + π − amplitudes [23]. Recently an amplitude model for D → 4π ± has become available [24], so in this paper a similar technique is applied to the 4π ± final state.…”

Section: Jhep01(2018)144mentioning

confidence: 99%

“…To determine how sensitive a binning scheme is to a measurement of γ, the Q ± values are defined [23], 8) where N i B ± is the number of B ± → DK ± , D → f decays expected in bin i (eq. (2.11) and eq.…”

Section: Optimal Binningmentioning

confidence: 99%

Model-independent determination of the strong phase difference between D0 and D ¯ 0 → π + π

Harnew

Naik

Prouvé

et al. 2018

J. High Energ. Phys.

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For the first time, the strong phase difference between D 0 and D 0 → π + π − π + π − amplitudes is determined in bins of the decay phase space. The measurement uses 818 pb −1 of e + e − collision data that is taken at the ψ(3770) resonance and collected by the CLEO-c experiment. The measurement is important for the determination of the CP -violating phase γ in B ± → DK ± (and similar) decays, where the D meson (which represents a superposition of D 0 and D 0 ) subsequently decays to π + π − π + π − . To obtain optimal sensitivity to γ, the phase space of the D → π + π − π + π − decay is divided into bins based on a recent amplitude model of the decay. Although an amplitude model is used to define the bins, the measurements obtained are model-independent. The CP -even fraction of the D → π + π − π + π − decay is determined to be F 4π + = 0.769 ± 0.021 ± 0.010, where the uncertainties are statistical and systematic, respectively. Using simulated B ± → DK ± , D → π + π − π + π − decays, it is estimated that by the end of the current LHC run, the LHCb experiment could determine γ from this decay mode with an uncertainty of (±10 ± 7) • , where the first uncertainty is statistical based on estimated LHCb event yields, and the second is due to the uncertainties on the parameters determined in this paper.

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The use of quantum-correlated D0 decays for φ3 measurement

Cited by 104 publications

References 16 publications

SuperB Progress Report for Physics

SuperB Progress Report for Physics

Quantum-correlated measurements of D → K S 0 π+π−π0 decays and consequences for the determination of the CKM angle γ

Model-independent determination of the strong phase difference between D0 and D ¯ 0 → π + π

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