Study of the Decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo stretchy="false">(</mml:mo><mml:msup><mml:mover accent="true"><mml:mi>B</mml:mi><mml:mo stretchy="true">¯</mml:mo></mml:mover><mml:mn>0</mml:mn></mml:msup><mml:mo stretchy="false">)</mml:mo><mml:mo>→</mml:mo><mml:msup><mml:mi>ρ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>ρ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>, and Constraints on

Aubert, B.

doi:10.1103/physrevlett.93.231801

Phys. Rev. Lett.

2004

DOI: 10.1103/physrevlett.93.231801

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Study of the DecayB0(B¯0)→ρ+ρ−, and Constraints on

B. Aubert

Abstract: Using a data sample of 89 x 10(6) Upsilon(4S)-->BB decays collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC, we measure the B0(B (0))-->rho(+)rho(-) branching fraction as [30+/-4(stat)+/-5(syst)]x10(-6) and a longitudinal polarization fraction of f(L)=0.99+/-0.03(stat)+0.04-0.03(syst). We measure the time-dependent-asymmetry parameters of the longitudinally polarized component of this decay as C(L)=-0.17+/-0.27(stat)+/-0.14(syst) and S(L)=-0.42+/-0.42(stat)+/-0.14(syst). We exclude v… Show more

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Cited by 38 publications

References 26 publications

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Estimating a signal in the presence of an unknown background

Rolke

López

2012

Nuclear Instruments and Methods in Physics Research Section A:

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We describe a method for fitting distributions to data which only requires knowledge of the parametric form of either the signal or the background but not both. The unknown distribution is fit using a non-parametric kernel density estimator. A transformation is used to avoid a problem at the data boundaries. The method returns parameter estimates as well as errors on those estimates. Simulation studies show that these estimates are unbiased and that the errors are correct.

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Estimating a signal in the presence of an unknown background

Rolke

López

2012

Nuclear Instruments and Methods in Physics Research Section A:

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New physics and evidence for a complex CKM

et al. 2005

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We carefully analyse the present experimental evidence for a complex CKM matrix, even allowing for New Physics contributions to ǫ K , a J/ΨK S , ∆M B d , ∆M Bs , and the ∆I = 1/2 piece of B → ρρ and B → ρπ. We emphasize the crucial rôle played by the angle γ in both providing irrefutable evidence for a complex CKM matrix and placing constraints on the size of NP contributions. It is shown that even if one allows for New Physics a real CKM matrix is excluded at a 99.92% C.L., and the probability for the phase γ to be in the interval

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CP violation and limits on New Physics including recent measurements

Botella

Branco

Nebot³

2007

Nuclear Physics B

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We analyse present constraints on the SM parameter space and derive, in a model independent way, various bounds on New Physics contributions to B 0 d -B 0 d and B 0 s -B 0 s mixings. Our analyses include information on a large set of asymmetries, leading to the measurement of the CKM phases γ andβ, as well as recent data from D0 and CDF related to the B 0 s -B 0 s system such as the measurement of ∆M Bs , A and ∆Γ CP s . We examine in detail several observables such as the asymmetries A d sl , A, the width differences ∆Γ d and ∆Γ CP s and discuss the rôle they play in establishing the limits on New Physics. The present data clearly favour the SM, with the New Physics favoured region placed around the SM solution. A New Physics solution significantly different from the SM is still allowed, albeit quite disfavoured (2.6% probability). We analyse the presently available indirect knowledge on the phaseχ entering in B 0 s -B 0 s mixing and study the impact of a future measurement ofχ to be achieved at LHC, through the measurement of the time-dependent CP asymmetry in B s → J/Ψ Φ decays.

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Study of the DecayB0(B¯0)→ρ+ρ−, and Constraints on

Cited by 38 publications

References 26 publications

Estimating a signal in the presence of an unknown background

Estimating a signal in the presence of an unknown background

New physics and evidence for a complex CKM

CP violation and limits on New Physics including recent measurements

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