Measurement of B+ , B0 and Λb0 production

Abstract

The inclusion of charge-conjugated state is implicit throughout unless explicitly noted.

nNNPDF2.0: quark flavor separation in nuclei from LHC data

“…Several groups have recently presented determinations of the nuclear PDFs using different input datasets, theoretical assumptions, and methodological settings [11][12][13][14][15]. While nPDF analyses are based on a significantly reduced dataset compared to the free-nucleon case, the situation has improved in recent years with the availability of hard-scattering cross-section data from proton-lead collisions at the LHC for processes such as jet, W and Z, and heavy quark production [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. These collider measurements can clarify several poorly understood aspects of nuclear PDFs, such as the quark flavor dependence of nuclear effects and the nuclear modifications of the gluon distribution.…”

Rare two-body decays of the top quark into a bottom meson plus an up or charm quark

“…Potentially large combinatorial backgrounds for such channels can be reduced if one avoids final states with neutral hadrons and with more than four tracks, which can be more difficult to reconstruct under high pp pileup conditions. Namely, focusing on B All experiments at the LHC (ATLAS [57], CMS [64,66,67], and LHCb [25][26][27][28][29][30][31][32] Table 8. Most important B 0 and B 0 s decay modes into D-mesons plus one (or two) light mesons, with total branching ratios (product of each consecutive decay, from [1]), and typical acceptances for the corresponding final-state decay products in the considered (π, K) central detector acceptances at the LHC and FCC.…”

“…The LHCb detector has unparalleled B 0 (s) reconstructions capabilities[17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32], albeit with (smaller) forward-only acceptance compared to ATLAS/CMS. Although tt production has been already observed in its dilepton final state[33,34], LHCb will integrate about a factor of 10 lower luminosities than ATLAS and CMS in the HL-LHC phase, and the feasibility of this search would thereby require a dedicated analysis beyond this first exploratory study.…”

Results from proton-lead and fixed-target collisions at LHCb

“…LHCb has measured for the first time the exclusive production of b-hadrons in nuclear collisions [7]. Several decay modes are used, in particular…”

“…Results from proton-lead and fixed-target collisions at LHCb Óscar Boente García Figure 1: Nuclear modification factors for the B + meson [7]. The measurement is presented as a function of pseudo-rapidity (left plot) and as a function of transverse momentum in the forward region (center) and backward region (right plot).…”