The R&D activities performed in Ferrara regarding a test bench for low temperature field measurement are presented. The system will be built and tested in Ferrara
A measurement of the K+→ π+μ+μ− decay Cortina Gil, E.; Kleimenova, A.; Minucci, E. ...
The journal of high energy physics,
11/2022, Volume:
2022, Issue:
11
Journal Article
Peer reviewed
Open access
A
bstract
A sample of 2
.
8 × 10
4
K
+
→
π
+
μ
+
μ
−
candidates with negligible background was collected by the NA62 experiment at the CERN SPS in 2017–2018. The model-independent branching fraction ...is measured to be (9
.
15 ± 0
.
08) × 10
−
8
, a factor three more precise than previous measurements. The decay form factor is presented as a function of the squared dimuon mass. A measurement of the form factor parameters and their uncertainties is performed using a description based on Chiral Perturbation Theory at
O
(
p
6
).
A high intensity Superconducting atomic beam source Statera, M.; Stancari, M.; Capiluppi, M. ...
IEEE transactions on applied superconductivity,
06/2005, Volume:
15, Issue:
2
Journal Article, Conference Proceeding
Peer reviewed
A high intensity atomic beam source design, based on superconducting technology, is presented. The design requires compact sextupole magnets with a tapered bore and pole tip fields of 6-9 T, using ...superfluid helium if necessary. The cryostat housing these magnets, in addition to maintaining a stable magnet temperature with a minimal thickness along the inner bore, must also function as a cryopump for the atoms that are not focused.
A precision measurement of the ratio RK of the rates of kaon leptonic decays K±→e±ν and K±→μ±ν with the full data sample collected by the NA62 experiment at CERN in 2007–2008 is reported. The result, ...obtained by analysing ∼150000 reconstructed K±→e±ν candidates with 11% background contamination, is RK=(2.488±0.010)×10−5, in agreement with the Standard Model expectation.
Effect of gonadectomy on body weight (BW), tibial length, uterine weight/body weight (UW/BW) ratio, left ventricle weight (LVW) and weight/tibial length ratio (LV/TL). ...https://doi.org/10.1371/journal.pone.0133225.t001 1. (2015) Sex Hormones Promote Opposite Effects on ACE and ACE2 Activity, Hypertrophy and Cardiac Contractility in Spontaneously Hypertensive Rats.
A
bstract
The NA62 experiment at CERN, designed to study the ultra-rare decay
K
+
→
π
+
ν
ν
¯
, has also collected data in beam-dump mode. In this configuration, dark photons may be produced by ...protons dumped on an absorber and reach a decay volume beginning 80 m downstream. A search for dark photons decaying in flight to
μ
+
μ
−
pairs is reported, based on a sample of 1
.
4 × 10
17
protons on dump collected in 2021. No evidence for a dark photon signal is observed. A region of the parameter space is excluded at 90% CL, improving on previous experimental limits for dark photon masses between 215 and 550 MeV
/c
2
.
The HERMES polarized atomic beam source Nass, A.; Baumgarten, C.; Braun, B. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
06/2003, Volume:
505, Issue:
3
Journal Article
Peer reviewed
Open access
The HERMES atomic beam source is used to provide nuclear polarized hydrogen or deuterium atoms for the HERMES target. The setup including the dissociator, the sextupole magnet system and the ...high-frequency transitions is described. Measurements of the hydrogen intensity of up to
6.4×10
16
atoms/
s
in two hyperfine substates and of the deuterium intensity of up to
5.8×10
16
atoms/
s
in three hyperfine substates are presented. A degree of dissociation of 92.8% for H (94.5% for D) at the entrance of the storage cell and a nuclear polarization of around 0.97 (H) and 0.92 (D) have been found constant within a couple of percent over the whole running period of the HERMES experiment.
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