The production of π and πβ² mesons is studied in proton-proton and proton-lead collisions collected with the LHCb detector. Proton-proton collisions are studied at center-of-mass energies of 5.02 and 13TeV and proton-lead collisions are studied at a center-of-mass energy per nucleon of 8.16TeV. The studies are performed in center-of-mass (c.m.) rapidity regions 2.5<π¦c.m.<3.5 (forward rapidity) and β4.0<π¦c.m.<β3.0 (backward rapidity) defined relative to the proton beam direction. The π and πβ² production cross sections are measured differentially as a function of transverse momentum for 1.5<πT<10GeV and 3<πT<10GeV, respectively. The differential cross sections are used to calculate nuclear modification factors. The nuclear modification factors for π and πβ² mesons agree at both forward and backward rapidity, showing no significant evidence of mass dependence. The differential cross sections of π mesons are also used to calculate π/π0 cross-section ratios, which show evidence of a deviation from the world average. These studies offer new constraints on mass-dependent nuclear effects in heavy-ion collisions, as well as π and πβ² meson fragmentation.
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g -factor engineering with InAsSb alloys toward zero band gap limit
- Award ID(s):
- 1809120
- NSF-PAR ID:
- 10458192
- Publisher / Repository:
- American Physical Society
- Date Published:
- Journal Name:
- Physical Review B
- Volume:
- 108
- Issue:
- 12
- ISSN:
- 2469-9950; PRBMDO
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
