Related Experiment Video
Updated: Apr 13, 2026
05:51
Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method
Published on: July 19, 2019
6.8K
Measurement of D^{0} Meson Photoproduction in Ultraperipheral Heavy Ion Collisions
V Chekhovsky1, A Hayrapetyan1, V Makarenko1
1Yerevan Physics Institute, Yerevan, Armenia.
Physical Review Letters
|April 11, 2026
Summary
This study presents the first measurement of D0 meson production in photonuclear ultraperipheral heavy ion collisions. These findings offer new insights into the structure of lead nuclei, specifically their parton distribution functions.
Area of Science:
- High Energy Physics
- Nuclear Physics
- Particle Physics
Background:
- Ultra-peripheral heavy ion collisions provide a unique environment to study photonuclear interactions.
- Measuring D0 meson production offers a probe into the internal structure of nuclei.
Purpose of the Study:
- To report the first measurement of photonuclear D0 meson production in lead-lead collisions.
- To characterize lead nuclear parton distribution functions (PDFs) using this novel approach.
Main Methods:
- Utilized CMS experiment data from lead-lead collisions at 5.36 TeV.
- Selected photonuclear events by identifying breakup neutrons and minimal particle activity.
- Reconstructed D0 mesons via the D0→K-π+ decay channel.
Main Results:
- Measured the cross section for D0 meson production as a function of transverse momentum and rapidity.
- Compared results with next-to-leading-order perturbative QCD calculations and color glass condensate framework predictions.
- Characterized lead nuclear PDFs for fractional momenta x from ~10^-4 to 10^-2.
Conclusions:
- This measurement represents a significant advancement in probing nuclear structure via photonuclear interactions.
- The results provide crucial data for refining theoretical models of parton distributions in heavy nuclei.
Related Concept Videos
01:06Nuclear Overhauser Enhancement (NOE)
1.6K
Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling. This phenomenon, called the nuclear Overhauser enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring spin-active...
1.6K
01:30Electric Dipoles and Dipole Moment
7.2K
Consider two charges of equal magnitude but opposite signs. If they cannot be separated by an external electric field, the system is called a permanent dipole. For example, the water molecule is a dipole, making it a good solvent.
Theoretically, studying electric dipoles leads to understanding why the resultant electric forces around us are weak. Since electric forces are strong, remnant net charges are rare. Hence, the interaction between dipoles helps us understand electrical interactions in...
Theoretically, studying electric dipoles leads to understanding why the resultant electric forces around us are weak. Since electric forces are strong, remnant net charges are rare. Hence, the interaction between dipoles helps us understand electrical interactions in...
7.2K
03:12Ionization Energy
44.9K
The amount of energy required to remove the most loosely bound electron from a gaseous atom in its ground state is called its first ionization energy (IE1). The first ionization energy for an element, X, is the energy required to form a cation with 1+ charge:
44.9K