C. Day

The BaBar detector: Upgrades, operation and performance

B Aubert, R Barate, D Boutigny, F Couderc et autres

The BaBar detector operated successfully at the PEP-II asymmetric e +e- collider at the SLAC National Accelerator Laboratory from 1999 to 2008. This report covers upgrades, operation, and performance of the collider and the detector systems, as well as the trigger, online …

Enhancing quality of life for dogs and cats in confined situations

RP Timmins, KD Cliff, C. Day, Benjamin L. Hart et autres

Abstract An international panel of experts in the fields of canine and feline health, welfare and behaviour conducted an online discussion addressing two questions: (1) how can one define quality of life (QoL) for dogs and cats in confined living situations, such …

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Measurement of the (B)over-bar lifetime and the B-0(B)over-bar(0) oscillation frequency using partially reconstructed (B)over-bar(0)-> D*+ l-(v)over-bar(l) decays

B. Aubert, R Barate, D Boutigny, F. Couderc et autres

We present a simultaneous measurement of the (B) over bar (0) lifetime tau(B0) and B-0(B) over bar (0) oscillation frequency Delta m(d). We use a sample of about 50 000 partially reconstructed (B) over bar (0)-> D(*+)l(-)nu(l) decays identified with the BABAR …

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Search for the decay B0→a1±ρ

B Aubert, R Barate, M Bona, D Boutigny et autres

We present a search for the rare B-meson decay B0→a1±ρ with a1±→π+π-π±. We use (110±1.2) ×106Υ(4S)→BB̄ decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We obtain an upper limit of 30×10-6(90%C.L.) for the branching fraction product …

Measurement of the total width, the electronic width, and the mass of the Υ(10580) resonance

B Aubert, R Barate, D Boutigny, F Couderc et autres

We present a measurement of the parameters of the Υ(10580) resonance based on a dataset collected with the BABAR detector at the SLAC PEP-II asymmetric B factory. We measure the total width Γtot=(20.7±1. 6±2.5)MeV, the electronic partial width Γee=(0.321±0. 017±0.029)keV and the …

Search for the decay τ-→4π-3π+(π0)ντ

B Aubert, R Barate, D Boutigny, F Couderc et autres

A search for the decay of the τ lepton to seven charged pions and one or zero π0 mesons was performed using the BABAR detector at the PEP-II asymmetric-energy e+e- collider. The analysis uses 232.2fb-1 of data at center-of-mass energies on or …

Measurement of time-dependent CP-violating asymmetries and constraints on sin (2β+γ) with partial reconstruction of B→D* π± decays

B Aubert, R Barate, D Boutigny, F Couderc et autres

We present a measurement of the time-dependent CP-violating asymmetries in decays of neutral B mesons to the final states D* π±, using approximately 232×106 BB̄ events recorded by the BABAR experiment at the PEP-II e+e- storage ring. Events containing these decays are …

Evidence for the decay B±→K*±π0

B Aubert, R Barate, D Boutigny, F Couderc et autres

We have measured the process B±→ (K*±→K±π0)π0 with 232×106 Υ(4S) →BB̄ decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. From a signal yield of 89±26 events we obtain the branching fraction B(B±→K*±π0)=[6. 9±2.0(stat)±1.3(syst)]×10-6 with a statistical …

Search for b -> u transitions in B- -> (DK-)-K-0 and B- -> (DK-)-K-*0

B. Aubert, R Barate, D Boutigny, F. Couderc et autres

We search for B-->(D) over tilde K-0(-) and B-->(D) over tilde K-*0(-) and charge conjugates. Here the symbol D-0 indicates decay of a D-0 or (D) over bar (0) into K(+)pi(-), while the symbol (D) over tilde (*0) indicates decay of a …

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Search for a charged partner of the X(3872) in the B meson decay B → X-K, X- → J/ψπ-π0

B Aubert, R Barate, D Boutigny, F Couderc et autres

We search for a charged partner of the X(3872) in the decay B → X - K, X- → J/ψπ-π0, using 234 × 106 BB events collected at the Y(4S) resonance with the BABAR detector at the PEP-II e+e- asymmetric-energy storage ring. …

Search for the decay tau(-->)4 pi(-)3 pi(+)(pi(0))nu(tau)

B Aubert, R Barate, D Boutigny, F Couderc et autres

A search for the decay of the tau lepton to seven charged pions and one or zero pi(0) mesons was performed using the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider. The analysis uses 232.2 fb(-1) of data at center-of-mass energies on …

Measurements of neutral B decay branching fractions to KS0π+π- final states

B Aubert, R Barate, D. Boutigny, F. Couderc et autres

Branching fraction measurements using B-meson decays to KS0π+π- are presented. These measurements were obtained by analyzing a data sample of 88.9×106 Υ(4S)→BB̅ decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. Using a maximum likelihood fit, the following …