Time-dependent Dalitz Plot Analysis of B0 --> Ks pi+ pi-

The BaBar Collaboration

Time-dependent Dalitz Plot Analysis of B0 --> Ks pi+ pi-

The BaBar Collaboration

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We perform a time-dependent Dalitz plot analysis of B0→K0Sπ+π− in order to extract the CP violation parameters of f0(980)K0S and ρ0(770)K0S and direct CP-asymmetries of K∗+(892)π−. The results are obtained from a data sample of (383±3)×106 BB¯ decays, collected with the BaBar detector at the PEP2 asymmetric--energy B factory at SLAC. The measured values of 2βeff in B0 decays to f0(980)K0S and ρ0(770)K0S are (89+22−20±5±8)∘ and (37+19−17±5±6)∘, respectively, where the first quoted uncertainty is statistical, the second is systematic and the third is Dalitz plot signal model uncertainty. We measure the significance of 2βeff(f0(980)K0S)≠0 to be 4.3σ. In decays to K∗(892)π we find ACP=−0.18±0.10±0.03±0.03. The measured phase difference between the decay amplitudes of B0→K∗+(892)π− and B¯0→K∗−(892)π+ is (−164±24±12±15)∘. All results are preliminary.

Original language	English
Title of host publication	Lepton and photon interactions at high energies. Proceedings, 23rd International Symposium
Number of pages	29
Publication status	Published - 2007
Event	23rd International Lepton and Photon Interactions at High Energies Symposium - Daegu, Korea, Republic of Duration: 13 Aug 2007 → 18 Aug 2007

Conference

Conference	23rd International Lepton and Photon Interactions at High Energies Symposium
Abbreviated title	LP2007
Country/Territory	Korea, Republic of
City	Daegu
Period	13/08/07 → 18/08/07

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https://arxiv.org/abs/0708.2097

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@inproceedings{f7e76231423a4b678c2b010563c35d8f,

title = "Time-dependent Dalitz Plot Analysis of B0 --> Ks pi+ pi-",

abstract = "We perform a time-dependent Dalitz plot analysis of B0→K0Sπ+π− in order to extract the CP violation parameters of f0(980)K0S and ρ0(770)K0S and direct CP-asymmetries of K∗+(892)π−. The results are obtained from a data sample of (383±3)×106 BB¯ decays, collected with the BaBar detector at the PEP2 asymmetric--energy B factory at SLAC. The measured values of 2βeff in B0 decays to f0(980)K0S and ρ0(770)K0S are (89+22−20±5±8)∘ and (37+19−17±5±6)∘, respectively, where the first quoted uncertainty is statistical, the second is systematic and the third is Dalitz plot signal model uncertainty. We measure the significance of 2βeff(f0(980)K0S)≠0 to be 4.3σ. In decays to K∗(892)π we find ACP=−0.18±0.10±0.03±0.03. The measured phase difference between the decay amplitudes of B0→K∗+(892)π− and B¯0→K∗−(892)π+ is (−164±24±12±15)∘. All results are preliminary.",

author = "George Lafferty and Nicholas Barlow and Roger Barlow and Yaw Chia and Christina Edgar and Timothy West and Jong Yi and {The BaBar Collaboration}",

year = "2007",

language = "English",

booktitle = "Lepton and photon interactions at high energies. Proceedings, 23rd International Symposium",

note = "23rd International Lepton and Photon Interactions at High Energies Symposium, LP2007 ; Conference date: 13-08-2007 Through 18-08-2007",

}

TY - GEN

T1 - Time-dependent Dalitz Plot Analysis of B0 --> Ks pi+ pi-

AU - Lafferty, George

AU - Barlow, Nicholas

AU - Barlow, Roger

AU - Chia, Yaw

AU - Edgar, Christina

AU - West, Timothy

AU - Yi, Jong

AU - The BaBar Collaboration

PY - 2007

Y1 - 2007

N2 - We perform a time-dependent Dalitz plot analysis of B0→K0Sπ+π− in order to extract the CP violation parameters of f0(980)K0S and ρ0(770)K0S and direct CP-asymmetries of K∗+(892)π−. The results are obtained from a data sample of (383±3)×106 BB¯ decays, collected with the BaBar detector at the PEP2 asymmetric--energy B factory at SLAC. The measured values of 2βeff in B0 decays to f0(980)K0S and ρ0(770)K0S are (89+22−20±5±8)∘ and (37+19−17±5±6)∘, respectively, where the first quoted uncertainty is statistical, the second is systematic and the third is Dalitz plot signal model uncertainty. We measure the significance of 2βeff(f0(980)K0S)≠0 to be 4.3σ. In decays to K∗(892)π we find ACP=−0.18±0.10±0.03±0.03. The measured phase difference between the decay amplitudes of B0→K∗+(892)π− and B¯0→K∗−(892)π+ is (−164±24±12±15)∘. All results are preliminary.

AB - We perform a time-dependent Dalitz plot analysis of B0→K0Sπ+π− in order to extract the CP violation parameters of f0(980)K0S and ρ0(770)K0S and direct CP-asymmetries of K∗+(892)π−. The results are obtained from a data sample of (383±3)×106 BB¯ decays, collected with the BaBar detector at the PEP2 asymmetric--energy B factory at SLAC. The measured values of 2βeff in B0 decays to f0(980)K0S and ρ0(770)K0S are (89+22−20±5±8)∘ and (37+19−17±5±6)∘, respectively, where the first quoted uncertainty is statistical, the second is systematic and the third is Dalitz plot signal model uncertainty. We measure the significance of 2βeff(f0(980)K0S)≠0 to be 4.3σ. In decays to K∗(892)π we find ACP=−0.18±0.10±0.03±0.03. The measured phase difference between the decay amplitudes of B0→K∗+(892)π− and B¯0→K∗−(892)π+ is (−164±24±12±15)∘. All results are preliminary.

M3 - Conference contribution

BT - Lepton and photon interactions at high energies. Proceedings, 23rd International Symposium

T2 - 23rd International Lepton and Photon Interactions at High Energies Symposium

Y2 - 13 August 2007 through 18 August 2007

ER -

Time-dependent Dalitz Plot Analysis of B0 --> Ks pi+ pi-

Abstract

Conference

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