11 research outputs found
Measurement of diffusion coefficients of francium and rubidium in yttrium based on laser spectroscopy
Search for the Exotic Meson X(5568) with the Collider Detector at Fermilab
A search for the exotic meson X(5568) decaying into the B[subscript s][superscript 0]π[superscript ±] final state is performed using data corresponding to 9.6  fb[superscript -1] from pp[over ¯] collisions at sqrt[s]=1960  GeV recorded by the Collider Detector at Fermilab. No evidence for this state is found and an upper limit of 6.7% at the 95% confidence level is set on the fraction of B[subscript s][superscript 0] produced through the X(5568)→B[subscript s][superscript 0]π[superscript ±} process
Search for the Exotic Meson X(5568) with the Collider Detector at Fermilab
A search for the exotic meson X(5568) decaying into the Bs0π± final state is performed using data corresponding to 9.6 fb-1 from pp̄ collisions at s=1960 GeV recorded by the Collider Detector at Fermilab. No evidence for this state is found and an upper limit of 6.7% at the 95% confidence level is set on the fraction of Bs0 produced through the X(5568)→Bs0π± process
Search for B-s(0) -> mu(+) mu(-) and B-0 -> mu(+) mu(-) decays with the full CDF Run II data set (vol 87, 072003, 2013)
Erratum: Search for Bs0 →μ+μ- and B0 →μ+μ- decays with the full CDF Run II data set (Physical Review D (2013) 87 (072003
Beam Request Spin-Filtering Studies at COSY
Summary of experiment:
We report on the progress of the PAX experimental program since the last PAC
meeting. During two blocks of each three weeks beam development intercepted by two
weeks of maintenance, systematic machine studies have been carried out. An effective
procedure for setting up the machine with the low-β section and a target cell at the new
PAX-IP in order to achieve high beam lifetimes has been developed.
The effect of flow-limiters and one NEG-pump on the beam lifetime has been studied,
as well as the effect of different beam emittances and beam intensities on the beam
lifetime. Even though by increasing the beam emittance a reproducible maximum for
the beam lifetime was achievable, no effect of the beam intensity was seen and therefore
no clear observation of the so-called Touschek-effect was possible. Nevertheless, we
learned how to gain a sufficient beam lifetime for spin-filtering studies at COSY and
apply for 3 weeks of beam development followed by 4 weeks of beam time
Status Report and Beam-Time Request for COSY experiment #199 Spin–Filtering Studies at COSY
We report on the progress of the PAX experimental programme since the last PAC
meeting. During summer shutdown 2009 four new quadrupole magnets and a modified
vacuum system have been installed into the COSY ring to form a section with low β
functions. With the successful commissioning of this low-β insertion in January 2010 it has
also been discovered that intra-beam scattering effects are likely limiting the beam lifetime.
In order to get these effects under control and to improve the lifetime, to commission a
new detection system, and to finally perform a first series of spin–filtering measurements
with transverse polarisation, we request ten weeks of beam time.
Content