Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Atomic Radii and Effective Nuclear Charge03:08

Atomic Radii and Effective Nuclear Charge

61.5K
The elements in groups of the periodic table exhibit similar chemical behavior. This similarity occurs because the members of a group have the same number and distribution of electrons in their valence shells.
61.5K
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

2.3K
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
2.3K
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)01:19

2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)

1.4K
Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...
1.4K
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

1.3K
The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
1.3K
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

2.7K
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...
2.7K
2D NMR: Overview of Heteronuclear Correlation Techniques01:18

2D NMR: Overview of Heteronuclear Correlation Techniques

722
Heteronuclear correlation spectroscopy is an analytical technique that investigates the coupling between different types of nuclei, often a proton and an X-nucleus, such as carbon-13 or nitrogen-15. This method is commonly used in nuclear magnetic resonance (NMR) spectroscopy to gain insights into complex chemical compounds' structural and compositional aspects. A typical heteronuclear correlation spectrum displays X-nucleus chemical shifts on one axis and a proton spectrum on the other...
722

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

The Phylogeny of Brassicaceae YABBYs and the <i>CRC</i>-Mediated Regulation of Stigma Development in <i>Brassica napus</i>.

International journal of molecular sciences·2026
Same author

Tailoring Supramolecular Polyurethane Featuring Bio-based Rigid-Flexible Segment Hybrids with Intrinsic Photothermal Conversion and Ultraviolet Blocking.

Research (Washington, D.C.)·2026
Same author

Oligomeric ultranano hydrogen water improves flock uniformity, antioxidant capacity and intestinal health in growth phase layer-type chickens.

Poultry science·2026
Same author

Identification and functional characterization of Z-DNA in plants.

Trends in plant science·2026
Same author

Revealing water-biopolymer interactions: Toward advanced water collection from air.

Innovation (Cambridge (Mass.))·2026
Same author

[Simulation and Prediction of Carbon Storage Changes in the Panxi Dry Valley Region Under Policy-oriented Scenarios].

Huan jing ke xue= Huanjing kexue·2026

Related Experiment Video

Updated: Jan 10, 2026

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method
05:51

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method

Published on: July 19, 2019

6.6K

NRQCD Confronts LHCb Data on Quarkonium Production within Jets.

Reggie Bain1, Yiannis Makris1, Thomas Mehen1

  • 1Department of Physics, Duke University, Durham, North Carolina 27713, USA.

Physical Review Letters
|August 5, 2017
PubMed
Summary

We analyzed J/ψ meson production in jets at LHCb, comparing data with theoretical models. Our calculations using fragmenting jet functions and nonrelativistic QCD show good agreement, improving upon standard simulations.

More Related Videos

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
14:11

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

27.5K
Setting Limits on Supersymmetry Using Simplified Models
07:46

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

8.9K

Related Experiment Videos

Last Updated: Jan 10, 2026

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method
05:51

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method

Published on: July 19, 2019

6.6K
Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
14:11

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

27.5K
Setting Limits on Supersymmetry Using Simplified Models
07:46

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

8.9K

Area of Science:

  • High Energy Physics
  • Quantum Chromodynamics (QCD)
  • Particle Physics

Background:

  • The production of heavy quarkonium states, such as the J/ψ meson, within jets is a complex phenomenon in high-energy particle collisions.
  • Previous simulations using default Pythia models showed poor agreement with LHCb measurements of the J/ψ momentum fraction within jets.

Purpose of the Study:

  • To analyze the LHCb measurement of the J/ψ momentum fraction within jets.
  • To compare LHCb data with theoretical calculations using the fragmenting jet function (FJF) formalism and nonrelativistic QCD (NRQCD).
  • To investigate the role of different extractions of nonperturbative NRQCD long-distance matrix elements (LDMEs).

Main Methods:

  • Analytic calculations employing the fragmenting jet function (FJF) formalism with Dokshitzer-Gribov-Lipatov-Altarelli-Parisi evolution.
  • Convolution of hard QCD partonic cross sections (calculated with MadGraph) and Pythia-showered events with leading-order NRQCD fragmentation functions.
  • Comparison of theoretical predictions with LHCb experimental data for the z(J/ψ) distribution.

Main Results:

  • Both FJF and NRQCD calculations provide reasonable agreement with the LHCb measured z(J/ψ) distribution.
  • Theoretical predictions show significant improvement over default Pythia simulations.
  • NRQCD calculations exhibit good agreement with LHCb data, irrespective of the LDME fit used, particularly those derived from high-transverse-momentum collider data.

Conclusions:

  • The fragmenting jet function formalism and NRQCD provide a more accurate description of J/ψ production in jets compared to default Pythia.
  • The study highlights the importance of nonperturbative NRQCD matrix elements and their accurate extraction for understanding heavy quarkonium production.
  • Collider data, especially at high transverse momentum, offers crucial constraints for LDME fits, leading to improved theoretical predictions.