Mainz 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 9: Hadron Structure and Spectroscopy I
HK 9.5: Vortrag
Montag, 28. März 2022, 15:15–15:30, HK-H8
LHCspin: towards a polarized gas target for the LHC — •Erhard Steffens1, Paolo Lenisa2, Vito Carassiti2, Giuseppe Ciullo2, Pasquale Di Nezza3, Luciano L. Pappalardo2, and Marco Santimaria3 — 1FAU, Erlangen, Germany — 2U. Ferrara and INFN, Italy — 3INFN Lab. Nat. di Frascati, Italy
The LHCspin project aims at unpolarized (SMOG2) and polarized fixed-target measurements by means of a gas target upstream of the LHCb detector, close to the vertex detector VELO. The forward geometry of the LHCb spectrometer (2<η<5) allows for the reconstruction of particles produced in fixed-target collisions, with center-of-mass energies ranging from √sNN = 72 GeV with Pb beam to √s = 115 GeV in pp collisions. The use of H and D targets, polarized transversely to the beam will allow to study the quark TMDs in pp collisions at unique kinematics. In addition, with LHCb being specifically designed for heavy-flavor physics, final states with c- or b-quarks will be efficiently reconstructed as demonstrated in detailed simulations, thus providing access to the so-far unknown gluon TMDs.
The design and status of the study will be presented. An openable storage cell with wake field suppressor and unpolarized gas feed system (SMOG2) is installed and ready to be tested during early 2022. A similar target with transverse B-field plus atomic beam source and diagnostics is being designed. The 7 TeV/1 A beam traversing the target might cause instabilities, which must be suppressed. This is studied in close collaboration with the LHC machine group.