Prompt atmospheric neutrino fluxes: perturbative QCD models and nuclear effects

We evaluate the prompt atmospheric neutrino flux at high energies using three different frameworks for calculating the heavy quark production cross section in QCD: NLO perturbative QCD, kT factorization including low-x resummation, and the dipole model including parton saturation. We use QCD parameters, the value for the charm quark mass and the range for the factorization and renormalization scales that provide the best description of the total charm cross section measured at fixed target experiments, at RHIC and at LHC. Using these parameters we calculate differential cross sections for charm and bottom production and compare with the latest data on forward charm meson production from LHCb at 7 TeV and at 13 TeV, finding good agreement with the data. In addition, we investigate the role of nuclear shadowing by including nuclear parton distribution functions (PDF) for the target air nucleus using two different nuclear PDF schemes. Depending on the scheme used, we find the reduction of the flux due to nuclear effects varies from 10% to 35% at the highest energies. Finally, we compare our results with the IceCube limit on the prompt neutrino flux, which is already providing valuable information about some of the QCD models.

NATURVETENSKAP Fysik Subatomär fysik hsv//swe
NATURAL SCIENCES Physical Sciences Subatomic Physics hsv//eng
NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
Neutrino Physics
Perturbative QCD
Solar and Atmospheric Neutrinos
Fysik med inriktning mot elementarpartikelfysik
Physics with specialization in Elementary Particle Physics

Enberg, RikardUppsala universitet,Högenergifysik,Theoretical high energy physics(Swepub:uu)ren03009 (författare)
Jeong, Yu Seon (författare)
Kim, C S (författare)
Reno, Mary Hall (författare)
Sarcevic, Ina (författare)
Stasto, Anna (författare)
Uppsala universitetHögenergifysik (creator_code:org_t)

Av författaren/redakt...: Bhattacharya, At ...; Enberg, Rikard; Jeong, Yu Seon; Kim, C S; Reno, Mary Hall; Sarcevic, Ina; visa fler...; Stasto, Anna; visa färre...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.