Ja n 20 05 Study of the decay φ → π + π − π 0 with the KLOE detector

نویسندگان

  • C. Bacci
  • V. Bocci
  • P. Branchini
  • M. Casarsa
  • F. Ceradini
  • F. Cevenini
  • G. Chiefari
  • G. De Robertis
  • B. Di Micco
  • A. Farilla
  • M. L. Ferrer
  • P. Franzini
  • F. Grancagnolo
  • E. Graziani
  • F. Lacava
  • G. Lanfranchi
  • L. Merola
  • A. Nedosekin
  • A. Passeri
  • E. Santovetti
  • R. D. Schamberger
  • F. Scuri
  • A. Ventura
  • G. W. Yu
چکیده

We present a study of the reaction e+e−→π+π−π0 at the φ peak, W = M(φ) =1019.4 MeV, observed with the KLOE detector at DAΦNE. The reaction is dominated by φ production and decay, e+e−→φ→π+π−π0. From a fit to the Dalitz plot density distribution we obtain the ρ-meson parameters for its three charge states. We also find the relative amplitudes for φ→ρπ and φ→π+π−π0 and the cross section for e+e− → ωπ0 with ω → π+π−.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Study of the decay φ → π + π − π 0 with the KLOE detector

We present a study of the reaction e+e−→π+π−π0 at the φ peak, W = M(φ) =1019.4 MeV, observed with the KLOE detector at DAΦNE. The reaction is dominated by φ production and decay, e+e−→φ→π+π−π0. From a fit to the Dalitz plot density distribution we obtain the ρ-meson parameters for its three charge states. We also find the relative amplitudes for φ→ρπ and φ→π+π−π0 and the cross section for e+e− ...

متن کامل

Measurement of the absolute branching ratio of the K + → π + π 0 ( γ ) decay with the KLOE detector The KLOE Collaboration

We have measured the absolute branching ratio of the K+ → π+π0 (γ) decay, using ∼20 million tagged K+ mesons collected with the KLOE detector at DAΦNE, the Frascati φ–factory. Signal counts are obtained from the fit of the distribution of the momentum of the charged decay particle in the kaon rest frame. The result, inclusive of final-state radiation, is BR(K+ → π+π0 (γ))=0.2065± 0.0005stat ± 0...

متن کامل

2 5 Ja n 20 16 Measurement of the φ → π 0 e + e − transition form factor with the KLOE detector

A measurement of the vector to pseudoscalar conversion decay φ → πee with the KLOE experiment is presented. A sample of ∼ 9500 signal events was selected from a data set of 1.7 fb of ee collisions at √ s ∼ mφ collected at the DAΦNE ee collider. These events were used to obtain the first measurement of the transition form factor |Fφπ0(q)| and a new measurement of the branching ratio of the decay...

متن کامل

Measurement of the absolute branching ratio of the K + → π + π 0 ( γ ) decay with the KLOE detector

We have measured the absolute branching ratio of the K+ → π+π0 (γ) decay, using ∼20 million tagged K+ mesons collected with the KLOE detector at DAΦNE, the Frascati φ–factory. Signal counts are obtained from the fit of the distribution of the momentum of the charged decay particle in the kaon rest frame. The result, inclusive of final-state radiation, is BR(K+ → π+π0 (γ))=0.2065± 0.0005stat ± 0...

متن کامل

Fe b 20 06 Study of the decay φ → f 0 ( 980 ) γ → π + π − γ with the KLOE detector

We measured, with the KLOE detector, the spectrum of π+π− invariant mass in a sample of 6.7 × 105 e+e− → π+π−γ events with the photon at large polar angle (θγ > 45 ) at a centre of mass energy √ s around the φ mass. We observe in this spectrum a clear contribution from the intermediate process φ → f0(980)γ. A sizeable effect is also observed in the distribution of the pion forward-backward asym...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2005