G. Rappazzo

activity

19982022

most citedFirst Observation of the Doubly Charmed Baryon Xi_cc^+

427 citations · 938 across the 18 of their papers we have counts for

collaborators

18 papers

hep-ex2022

Investigation of $K^{+} K^{-}$ pairs in the effective mass region near $2 m_{K}$

B. Adeva, L. Afanasyev, A. Anania +53

The DIRAC experiment at CERN investigated in the reaction $p (24 GeV /c) + Ni$ the particle pairs $K^{+} K^{-}, π^{+} π^{-}$ and $p p ˉ$ with relative momentum $Q$ in the pair s…

hep-ex2018★ 5 cited

First measurement of a long-lived $π^{+} π^{-}$ atom lifetime

B. Adeva, L. Afanasyev, A. Anania +56

The adapted DIRAC experiment at the CERN PS accelerator observed for the first time long-lived hydrogen-like $π^{+} π^{-}$ atoms, produced by protons hitting a beryllium target. A part…

hep-ex2017★ 11 cited

Measurement of the $π K$ atom lifetime and the $π K$ scattering length

DIRAC Collaboration, B. Adeva, L. Afanasyev +62

After having announced the statistically significant observation (5.6~ $σ$ ) of the new exotic $π K$ atom, the DIRAC experiment at the CERN proton synchrotron presents the measurement…

hep-ex2016★ 14 cited

Observation of $π^{-} K^{+}$ and $π^{+} K^{-}$ atoms

DIRAC Collaboration

The observation of hydrogen-like $π K$ atoms, consisting of $π^{-} K^{+}$ or $π^{+} K^{-}$ mesons, is presented. The atoms have been produced by 24 GeV/ $c$ protons from the CERN PS accelera…

nucl-ex2014★ 25 cited

First $π K$ atom lifetime and $π K$ scattering length measurements

B. Adeva, L. Afanasyev, Y. Allkofer +65

The results of a search for hydrogen-like atoms consisting of $π^{\mp} K^{\pm}$ mesons are presented. Evidence for $π K$ atom production by 24 GeV/c protons from CERN PS interacting…

hep-ex2011★ 52 cited

Determination of $π π$ scattering lengths from measurement of $π^{+} π^{-}$ atom lifetime

B. Adeva, L. Afanasyev, M. Benayoun +92

The DIRAC experiment at CERN has achieved a sizeable production of $π^{+} π^{-}$ atoms and has significantly improved the precision on its lifetime determination. From a sample of 21227…

hep-ex2009★ 17 cited

Evidence for $π K$ -atoms with DIRAC

B. Adeva, L. Afanasyev, Y. Allkofer +77

We present evidence for the first observation of electromagnetically bound $π^{\pm} K^{\mp}$ -pairs ( $π K$ -atoms) with the DIRAC experiment at the CERN-PS. The $π K$ -atoms are produced by…

hep-ex2005★ 106 cited

First measurement of the $π^{+} π^{-}$ atom lifetime

The DIRAC collaboration

The goal of the DIRAC experiment at CERN (PS212) is to measure the $π^{+} π^{-}$ atom lifetime with 10% precision. Such a measurement would yield a precision of 5% on the value of the $…

hep-ex2004★ 91 cited

First observation of a narrow charm-strange meson DsJ(2632) -> Ds eta and D0 K+

The SELEX Collaboration, A. V. Evdokimov

We report the first observation of a charm-strange meson DsJ(2632) at a mass of 2632.6+/-1.6 MeV/c^2 in data from SELEX, the charm hadro-production experiment E781 at Fermilab. Thi…

hep-ex2003★ 5 cited

Production Asymmetry of $D_{s}$ from 600 GeV/c $Σ^{-}$ and $π^{-}$ beam

M. Kaya

The production of $D_{s}^{-}$ relative to $D_{s}^{+}$ as a function of $x_{F}$ with 600 GeV/c $Σ^{-}$ beam is measured in the interval $0.15 < x_{F} < 0.7$ by the SELEX (E781) experiment at Fer…

hep-ex2002★ 427 cited

First Observation of the Doubly Charmed Baryon Xi_cc^+

The SELEX Collaboration, M. Mattson

We observe a signal for the doubly charmed baryon Xi_cc^+ in the charged decay mode Xi_cc^+ --> Lambda_c^+ K- pi+ in data from SELEX, the charm hadro-production experiment at Fermi…

hep-ex2001★ 45 cited

Hadronic Production of Lambda_c from 600 GeV/c pion, sigma and proton beams

SELEX Collaboration, Fernanda G. Garcia

We present data from Fermilab experiment E781 (SELEX) on the hadroproduction asymmetry for anti-Lambda_c compared to Lambda_c+ as a function of xF and pt2 distributions for Lambda_…

hep-ex2001★ 5 cited

First Measurement of pi e -> pi e gamma Pion Virtual Compton Scattering

FNAL SELEX Collaboration

Pion Virtual Compton Scattering (VCS) via the reaction pi e --> pi e gamma was observed in the Fermilab E781 SELEX experiment. SELEX used a 600 GeV/c pi- beam incident on target at…

hep-ex2001★ 13 cited

Measurement of the Ds lifetime

M. Iori

We report precise measurement of the Ds meson lifetime. The data were taken by the SELEX experiment (E781) spectrometer using 600 GeV/c Sigma-, pi- and p beams. The measurement has…

hep-ex2001★ 66 cited

Measurement of the Sigma^- Charge Radius by Sigma^- Electron Elastic Scattering

SELEX Collaboration, I. Eschrich

The Sigma^- mean squared charge radius has been measured in the space-like Q^2 range 0.035-0.105 GeV^2/c^2 by elastic scattering of a Sigma^- beam off atomic electrons. The measure…

hep-ex2000★ 33 cited

Precision measurements of the Lambda_c+ and D0 lifetimes

The SELEX collaboration, A. Kushnirenko

We report new precision measurements of the lifetimes of the Lambda_c+ and D0 from SELEX, the charm hadro-production experiment at Fermilab. Based upon 1630 Lambda_c+ and 10210 D0…

hep-ex1999★ 15 cited

Observation of the Cabibbo-suppressed decay Xi_c+ -> p K- pi+

SELEX Collaboration, S. Y. Jun

We report the first observation of the Cabibbo-suppressed charm baryon decay Xi_c+ -> p K- pi+. We observe 150 +- 22 events for the signal. The data were accumulated using the SELE…

hep-ex1998★ 8 cited

First Charm Hadroproduction Results from SELEX

SELEX Collaboration, J. Russ

The SELEX experiment (E781) at Fermilab is a 3-stage magnetic spectrometer for the high statistics study of charm hadroproduction out to large x_F using 600 GeV Sigma^-, p and pi b…

Investigation of K+K− pairs in the effective mass region near 2mK​

First measurement of a long-lived π+π− atom lifetime

Measurement of the πK atom lifetime and the πK scattering length

Observation of π−K+ and π+K− atoms

First πK atom lifetime and πK scattering length measurements

Determination of ππ scattering lengths from measurement of π+π− atom lifetime

Evidence for πK-atoms with DIRAC

First measurement of the π+π− atom lifetime