recid:1648659 - Risultato della ricerca

Pagina principale > Risultato della ricerca: recid:1648659

Cerca collezioni:

Ordinamento per:	Visualizza risultati:	Formato di visualizzazione:

CERN Document Server	2,036 record trovati 1 - 10 salta al record:	La ricerca ha impiegato 0.43 secondi.

(100)

First $\pi K$ atom lifetime and $\pi K$ scattering length measurements / DIRAC Collaboration
The results of a search for hydrogen-like atoms consisting of $\pi^{\mp}K^{\pm}$ mesons are presented. Evidence for $\pi K$ atom production by 24 GeV/c protons from CERN PS interacting with a nickel target has been seen in terms of characteristic $\pi K$ pairs from their breakup in the same target ($178 \pm 49$) and from Coulomb final state interaction ($653 \pm 42$). [...]
arXiv:1403.0845; CERN-PH-EP-2014-030; DIRAC-PUB-2014-01; CERN-PH-EP-2014-030.- Geneva : CERN, 2014-07-30 - 7 p. - Published in : Phys. Lett. B 735 (2014) 288-294 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: PDF; Preprint: PDF;

Record dettagliato - Record simili

(91)

Observation of $\pi^- K^+$ and $\pi^+ K^-$ atoms / DIRAC Collaboration
The observation of hydrogen-like $\pi K$ atoms, consisting of $\pi^- K^+$ or $\pi^+ K^-$ mesons, is presented. The atoms have been produced by 24 GeV/$c$ protons from the CERN PS accelerator, interacting with platinum or nickel foil targets. [...]
arXiv:1605.06103; CERN-EP-2016-128; DIRAC-PUB-2016-02.- Geneva : CERN, 2016-09-08 - 6 p. - Published in : Phys. Rev. Lett. 117 (2016) 112001 Draft (restricted): PDF; Fulltext: arXiv:1605.06103 - PDF; 10.1103_PhysRevLett.117.112001 - PDF; PhysRevLett.117.112001 - PDF; Preprint: PDF; External link: Fulltext

Record dettagliato - Record simili

(85)

Measurement of the $\pi K$ atom lifetime and the $\pi K$ scattering length / DIRAC Collaboration
After having announced the statistically significant observation (5.6~$\sigma$) of the new exotic $\pi K$ atom, the DIRAC experiment at the CERN proton synchrotron presents the measurement of the corresponding atom lifetime, based on the full $\pi K$ data sample: $\tau = (5.5^{+5.0}_{-2.8}) \cdot 10^{-15}s$. By means of a precise relation ($<1\%$) between atom lifetime and scattering length, the following value for the S-wave isospin-odd $\pi K$ scattering length $a_0^{-}~=~\frac{1}{3}(a_{1/2}-a_{3/2})$ has been derived: $\left|a_0^-\right| = (0.072^{+0.031}_{-0.020}) M_{\pi}^{-1}$..
arXiv:1707.02184; CERN-EP-2017-137; DIRAC-PUB-2017-01.- Geneva : CERN, 2017-09-19 - 18 p. - Published in : Phys. Rev. D 96 (2017) 052002 Draft (restricted): PDF; Fulltext: CERN-EP-2017-137 - PDF; arXiv:1707.02184 - PDF; Fulltext from publisher: PDF;

Record dettagliato - Record simili

(71)

Evidence for $\pi K$-atoms with DIRAC / Adeva, B. (Santiago de Compostela U., IGFAE) ; Afanasyev, L. (Dubna, JINR) ; Allkofer, Y. (Zurich U.) ; Amsler, Claude (Zurich U.) ; Anania, A. (INFN, Messina ; Messina U.) ; Benelli, A. (Zurich U.) ; Brekhovskikh, V. (Serpukhov, IHEP) ; Caragheorgheopol, G. (Bucharest, IFIN-HH) ; Cechak, T. (Prague, Tech. U.) ; Chiba, M. (Tokyo Metropolitan U.) et al.
We present evidence for the first observation of electromagnetically bound $\pi^\pm K^\mp$-pairs ($\pi K$-atoms) with the DIRAC experiment at the CERN-PS. The $\pi K$-atoms are produced by the 24 GeV/c proton beam in a thin Pt-target and the $\pi^\pm$ and $K^\mp$-mesons from the atom dissociation are analyzed in a two-arm magnetic spectrometer. [...]
arXiv:0905.0101; DIRAC-PUB-2009-01; DIRAC-PUB-2009-01.- 2009 - 6 p. - Published in : Phys. Lett. B 674 (2009) 11-16 Fulltext: arXiv:0905.0101 - PDF; 1-s2.0-S0370269309002433-main - PDF; External link: Preprint

Record dettagliato - Record simili

(57)

Updated DIRAC spectrometer at CERN PS for the investigation of ππ and πK atoms / PS212 collaboration
The DIRAC spectrometer installed at CERN PS was redesigned and upgraded in order to study simultaneously Aππ and AπK atoms, namely the bound states of π+π–, and π+K–, π–K+ mesons. The detector system which is able to accept a high intensity beam such as 2 - 6 × 1011 primary protons per second, the electronics and the data-acquisition system adapted to handle very large amount of data actually allowed to identify successfully π, K, p, e and µ and to give the possibility to select π-π and π-K pairs in the off-line analysis. [...]
CERN-PH-EP-2015-147; DIRAC-PUB-2016-03.- Geneva : CERN, 2016 - 34 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 839 (2016) 52-85 Draft (restricted): PDF; Fulltext: PDF;

Record dettagliato - Record simili

(56)

First measurement of a long-lived $\pi^+ \pi^-$ atom lifetime / DIRAC Collaboration
The adapted DIRAC experiment at the CERN PS accelerator observed for the first time long-lived hydrogen-like $\pi^+\pi^-$ atoms, produced by protons hitting a beryllium target. A part of these atoms crossed the gap of 96~mm and got broken up in the 2.1~\textmu{}m thick platinum foil. [...]
arXiv:1811.08659; CERN-EP-2018-281; DIRAC-PUB-2019-01.- Geneva : CERN, 2019-03-01 - 7 p. - Published in : Phys. Rev. Lett. 122 (2019) 082003 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: 1811.08659 - PDF; CERN-EP-2018-281 - PDF;

Record dettagliato - Record simili

(51)

First observation of $\pi$K atom and its lifetime measurement / Adeva, B (Santiago de Compostela U.) ; Afanasiev, L G (Dubna, JINR) ; Berka, Z (Prague, Tech. U.) ; Brekhovskikh, V (Serpukhov, IHEP) ; Caragheorgheopol, G (Bucharest, IFIN-HH) ; Cechák, T (Prague, Tech. U.) ; Chiba, M (Tokyo Metropolitan U.) ; Costantini, S (Basel U.) ; Constantinescu, S (Bucharest, IFIN-HH) ; Détraz, C (CERN) et al.
CERN-SPSC-2000-032 ; SPSC-P-284-ADD-2 ; DIRAC-NOTE-2000-09 ; DIRAC-DOC-2000-01. - 2000. - 75 p.
Fulltext - Fulltext

Record dettagliato - Record simili

(47)

Detection of $\pi^{+} \pi^{-}$ atoms with the DIRAC spectrometer at CERN / DIRAC Collaboration
The goal of the DIRAC experiment at CERN is to measure with high precision the lifetime of the $\pi^+\pi^-$ atom ($A_{2\pi}$), which is of order $3\times10^{-15}$ s, and thus to determine the s-wave $\pi\pi$-scattering lengths difference $|a_{0}-a_{2}|$. $A_{2\pi}$ atoms are detected through the characteristic features of $\pi^+\pi^-$ pairs from the atom break-up (ionization) in the target. [...]
hep-ex/0409053; DIRAC-PUB-2004-03.- 2004 - 19 p. - Published in : J. Phys. G 30 (2004) 1929-1946 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ex/0409053 PDF

Record dettagliato - Record simili

(47)

DIRAC Experiment and Test of Low-Energy QCD / DIRAC Collaboration
The low-energy QCD predictions to be tested by the DIRAC experiment are revised. The experimental method, the setup characteristics and capabilities, along with first experimental results are reported. [...]
hep-ph/0001279; IFA-HEP-12-25; IFA-HEP-12-25; DIRAC-CONF-1999-06.- Bucharest : Romanian Committ. Nucl. Energy Inst. At. Phys., 2000 - 10 p. - Published in : , pp. 407-416
Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ph/0001279 PDF
In : International Symposium on Advances in Nuclear Physics, Bucharest, Romania, 9 - 10 Dec 1999, pp.407

Record dettagliato - Record simili

10.

(47)

Lifetime measurement of $\pi^{+}\pi^{-}$ atoms to test low energy QCD predictions / for the DIRAC Collaboration
DIRAC-NOTE-1995-01 ; CERN-SPSLC-95-1 ; SPSLC-P-284 ; DIRAC-DOC-1994-01. - 1995. - 132 p.
Fulltext - Fulltext - CERN library copies

Record dettagliato - Record simili

Non hai trovato quello che cercavi? Prova la ricerca su altri server:
recid:1648659 in Amazon recid:1648659 in CERN EDMS recid:1648659 in CERN Intranet recid:1648659 in CiteSeer recid:1648659 in Google Books recid:1648659 in Google Scholar recid:1648659 in Google Web recid:1648659 in IEC	recid:1648659 in IHS recid:1648659 in INSPIRE recid:1648659 in ISO recid:1648659 in KISS Books/Journals recid:1648659 in KISS Preprints recid:1648659 in NEBIS recid:1648659 in SLAC Library Catalog

CERN Document Server

Access articles, reports and multimedia content in HEP

Main menu

CERN Accelerating science