NOESY around the critical point Omega Tau c = 1.12. Precise determination of proton-proton distances and reorientation correlation times with two-field NOESY

2000 ◽  
Vol 98 (4) ◽  
pp. 201-210
Author(s):  
Tao Zhang, Xi-An Mao, Matthias Baur, Ho
Keyword(s):  
Critical Point ◽  
Precise Determination ◽  
Correlation Times ◽  
Proton Proton

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 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 “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 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 Increasing AFM colloidal probe accuracy by optical tweezers

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tomasz Witko ◽  
Zbigniew Baster ◽  
Zenon Rajfur ◽  
Kamila Sofińska ◽  
Jakub Barbasz
Keyword(s):  
Critical Point ◽  
Optical Tweezers ◽  
Calibration Method ◽  
Precise Determination ◽  
Spring Constant ◽  
Probe Type ◽  
Colloidal Probe ◽  
Constant Determination ◽  
Accuracy And Repeatability

AbstractA precise determination of the cantilever spring constant is the critical point of all colloidal probe experiments. Existing methods are based on approximations considering only cantilever geometry and do not take into account properties of any object or substance attached to the cantilever. Neglecting the influence of the colloidal sphere on the cantilever characteristics introduces significant uncertainty in a spring constant determination and affects all further considerations. In this work we propose a new method of spring constant calibration for ‘colloidal probe’ type cantilevers based on the direct measurement of force constant. The Optical Tweezers based calibration method will help to increase the accuracy and repeatability of the AFM colloidal probe experiments.

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.

PRECISE DETERMINATION OF THE IRRATIONAL PRE-FERRED INTERFACE ORIENTATION BY TEM

2010 ◽  
Vol 46 (4) ◽  
pp. 411-417 ◽  
Author(s):  
Yang MENG ◽  
Lin GU ◽  
Wenzheng ZHANG
Keyword(s):  
Precise Determination ◽  
Interface Orientation
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