scholarly journals “Perfecting” pure shift HSQC: full homodecoupling for accurate and precise determination of heteronuclear couplings

2014 ◽  
Vol 50 (99) ◽  
pp. 15702-15705 ◽  
Author(s):  
L. Kaltschnee ◽  
A. Kolmer ◽  
I. Timári ◽  
V. Schmidts ◽  
R. W. Adams ◽  
...  
Keyword(s):  
High Precision ◽  
Precise Determination ◽  
Proton Proton

Full suppression of proton–proton couplings in pure shift HSQC spectra simplifies their analysis, as demonstrated for high precision RDC measurements.

scholarly journals Luminosity Measurements at the LHC at CERN Using Medipix, Timepix and Timepix3 Devices

Physics ◽  
2021 ◽  
Vol 3 (3) ◽  
pp. 579-654
Author(s):  
André Sopczak
Keyword(s):  
Hadron Collider ◽  
Precise Determination ◽  
Particle Accelerator ◽  
Proton Proton ◽  
Performance Improvements ◽  
Long Term Stability ◽  
Pixel Detectors ◽  
Relative Luminosity ◽  
Radiation Induced

The precise determination of the luminosity is essential for many analyses in physics based on the data from the particle accelerator Large Hadron Collider (LHC) at CERN. There are different types of detectors used for the luminosity measurements. The focus of this review is on luminosity measurements with hybrid-pixel detectors and the progress made over the past decade. The first generations of detectors of the Medipix and Timepix families had frame-based readout, while Timepix3 has a quasi-continuous readout. The applications of the detectors are manifold, and in particular, the detectors have been operated in the harsh environment of the LHC. The excellent performance in detecting high fluxes of elementary particles made these detectors ideal tools to measure the delivered luminosity resulting from proton–proton collisions. Important aspects of this review are the performance improvements in relative luminosity measurements from one detector generation to another, the long-term stability of the measurements, absolute luminosity measurements, material activation (radiation-induced) corrections, and the measurement of luminosity from neutron counting. Rather than bunch-average luminosity provided by previous detector generations, owing to the excellent time-resolution, Timepix3 measured the luminosity of individual proton bunches that are 25 ns apart. This review demonstrates the large progress in the precision of luminosity measurements during LHC Run-1 and Run-2 operations using hybrid-pixel detectors, and thus their importance for luminosity measurements in the future of LHC operations.

scholarly journals On the precise determination of the Tsallis parameters in proton–proton collisions at LHC energies

2018 ◽  
Vol 45 (5) ◽  
pp. 055001 ◽  
Author(s):  
T Bhattacharyya ◽  
J Cleymans ◽  
L Marques ◽  
S Mogliacci ◽  
M W Paradza
Keyword(s):  
Precise Determination ◽  
Proton Proton ◽  
Proton Collisions ◽  
Proton Proton Collisions

scholarly journals High precision osmium stable isotope measurements by double spike MC-ICP-MS and N-TIMS

2017 ◽  
Vol 32 (4) ◽  
pp. 749-765 ◽  
Author(s):  
Josefine A. M. Nanne ◽  
Marc-Alban Millet ◽  
Kevin W. Burton ◽  
Chris W. Dale ◽  
Geoff M. Nowell ◽  
...  
Keyword(s):  
Stable Isotope ◽  
High Precision ◽  
Precise Determination ◽  
Icp Ms ◽  
Isotope Measurements ◽  
Osmium Isotope

We present a method for precise determination of stable osmium isotope compositions by MC-ICP-MS and N-TIMS using a double spike.

Two-field-NOESY for precise determination of proton–proton distances and correlation times

1999 ◽  
Vol 111 (17) ◽  
pp. 8253-8254 ◽  
Author(s):  
Xi-An Mao ◽  
Tao Zhang ◽  
Matthias Baur ◽  
Horst Kessler
Keyword(s):  
Precise Determination ◽  
Correlation Times ◽  
Proton Proton

scholarly journals Precise determination of the $$B_{\mathrm{s}}^0$$–$$\overline B_{\mathrm{s}}^0$$ oscillation frequency

2022 ◽  
Author(s):  
◽  
R. Aaij ◽  
C. Abellán Beteta ◽  
T. Ackernley ◽  
B. Adeva ◽  
...  
Keyword(s):  
Oscillation Frequency ◽  
Strange Quark ◽  
Mass Difference ◽  
Hadron Collider ◽  
Precise Determination ◽  
Proton Proton ◽  
Proton Collisions ◽  
Lhcb Detector ◽  
Proton Proton Collisions

AbstractMesons comprising a beauty quark and strange quark can oscillate between particle ($${B}_{\mathrm{s}}^{0}$$ B s 0 ) and antiparticle ($${\overline{B}}_{\mathrm{s}}^{0}$$ B ¯ s 0 ) flavour eigenstates, with a frequency given by the mass difference between heavy and light mass eigenstates, Δms. Here we present a measurement of Δms using $${B}_{\mathrm{s}}^{0}\to {D}_{\mathrm{s}}^{-}$$ B s 0 → D s − π+ decays produced in proton–proton collisions collected with the LHCb detector at the Large Hadron Collider. The oscillation frequency is found to be Δms = 17.7683 ± 0.0051 ± 0.0032 ps−1, where the first uncertainty is statistical and the second is systematic. This measurement improves on the current Δms precision by a factor of two. We combine this result with previous LHCb measurements to determine Δms = 17.7656 ± 0.0057 ps−1, which is the legacy measurement of the original LHCb detector.

scholarly journals A Precise Determination of Some Critical Terms in the Solar System

1979 ◽  
Vol 81 ◽  
pp. 91-93
Author(s):  
Jean Chapront ◽  
Rudolf Dvorak
Keyword(s):  
Perturbation Theory ◽  
Solar System ◽  
High Precision ◽  
Precise Determination ◽  
Small Divisors ◽  
The Mean ◽  
New Form ◽  
Very High

A new form to determine the contribution of some special small divisors in perturbation theory is presented in this paper. We can avoid to calculate all the kλ+k′λ as it has to be done normally (λ and λ′ designate the mean longitudes of the two regarded planets). For a chosen k and k′ we calculate with a very high precision the contribution to the perturbation of the elements with the aid of the Hansen's coefficients.

On effects of non-systematic reflections on weak-beam images of partial dislocations

1991 ◽  
Vol 49 ◽  
pp. 688-689
Author(s):  
K. Z. Botros ◽  
S. S. Sheinin
Keyword(s):  
High Precision ◽  
Stacking Fault ◽  
Important Application ◽  
Stacking Fault Energy ◽  
Sharp Peak ◽  
Weak Beam ◽  
Partial Dislocations ◽  
Deviation Parameter ◽  
Beam Diffraction

The main features of weak beam images of dislocations were first described by Cockayne et al. using calculations of intensity profiles based on the kinematical and two beam dynamical theories. The feature of weak beam images which is of particular interest in this investigation is that intensity profiles exhibit a sharp peak located at a position very close to the position of the dislocation in the crystal. This property of weak beam images of dislocations has an important application in the determination of stacking fault energy of crystals. This can easily be done since the separation of the partial dislocations bounding a stacking fault ribbon can be measured with high precision, assuming of course that the weak beam relationship between the positions of the image and the dislocation is valid. In order to carry out measurements such as these in practice the specimen must be tilted to "good" weak beam diffraction conditions, which implies utilizing high values of the deviation parameter Sg.

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