Ultra-peripheral Pb-Pb collisions, in which the two nuclei pass close to each other, but at an impact parameter greater than the sum of their radii, provide information about the initial state of nuclei. In particular, heavy vector meson production, where the particle mass sets a hard scale, proceeds in such collisions by photon-gluon interactions, and gives access to nuclear PDFs. The ALICE collaboration has published measurements of J/psi and psi(2S) photoproduction in ultra-peripheral collisions in LHC Run 1 at forward (J/psi) and mid-rapidity, and has obtained a substantially larger data set in 2015 from LHC Run 2, allowing much more detailed studies of the production mechanism to be performed. In particular, the increased energy and mo...
We have performed the first measurement of the coherent psi(2S) photo-production cross section in ul...
Lead nuclei, accelerated at the LHC, are sources of strong electromagnetic fields that can be used t...
Lead nuclei, accelerated at the LHC, are sources of strong electromagnetic fields that can be used t...
Ultra-peripheral Pb-Pb collisions, in which the two nuclei pass close to each other, but at an impac...
Ultra-peripheral Pb-Pb collisions, in which the two nuclei pass close to each other, but at an impac...
The photoproduction of vector mesons in ultra-peripheral collisions (UPC) is a powerful tool to prob...
Lead nuclei, accelerated at the LHC, are sources of strong electromagnetic fields which can be used ...
Ultra-peripheral collisions (UPC) occur when the interacting nuclei or protons have an impact parame...
The ALICE collaboration performed the first rapidity-differential measurement of J/psi coherent phot...
The ALICE Collaboration has made the first measurement at the LHC of J/psi photoproduction in ultra-...
The ALICE Collaboration has made the first measurement at the LHC of J/psi photoproduction in ultra-...
The ALICE Collaboration at the LHC has measured the J/psi and psi photoproduction at mid-rapidity in...
There are several predictions for the behaviour of the gluon distribution in nuclei at small Bjorken...
We have performed the first measurement of the coherent psi(2S) photo-production cross section in ul...
The photoproduction of heavy vector mesons in the electromagnetic interactions of ultra-relativistic...
We have performed the first measurement of the coherent psi(2S) photo-production cross section in ul...
Lead nuclei, accelerated at the LHC, are sources of strong electromagnetic fields that can be used t...
Lead nuclei, accelerated at the LHC, are sources of strong electromagnetic fields that can be used t...
Ultra-peripheral Pb-Pb collisions, in which the two nuclei pass close to each other, but at an impac...
Ultra-peripheral Pb-Pb collisions, in which the two nuclei pass close to each other, but at an impac...
The photoproduction of vector mesons in ultra-peripheral collisions (UPC) is a powerful tool to prob...
Lead nuclei, accelerated at the LHC, are sources of strong electromagnetic fields which can be used ...
Ultra-peripheral collisions (UPC) occur when the interacting nuclei or protons have an impact parame...
The ALICE collaboration performed the first rapidity-differential measurement of J/psi coherent phot...
The ALICE Collaboration has made the first measurement at the LHC of J/psi photoproduction in ultra-...
The ALICE Collaboration has made the first measurement at the LHC of J/psi photoproduction in ultra-...
The ALICE Collaboration at the LHC has measured the J/psi and psi photoproduction at mid-rapidity in...
There are several predictions for the behaviour of the gluon distribution in nuclei at small Bjorken...
We have performed the first measurement of the coherent psi(2S) photo-production cross section in ul...
The photoproduction of heavy vector mesons in the electromagnetic interactions of ultra-relativistic...
We have performed the first measurement of the coherent psi(2S) photo-production cross section in ul...
Lead nuclei, accelerated at the LHC, are sources of strong electromagnetic fields that can be used t...
Lead nuclei, accelerated at the LHC, are sources of strong electromagnetic fields that can be used t...