6533b837fe1ef96bd12a293e

RESEARCH PRODUCT

Precision measurement of the structure function ratiosF 2 He /F 2 D ,F 2 C /F 2 D andF 2 Ca /F 2 D

L. FluriE. RondioG. K. MallotE.m. KabußM. SieblerR. KaiserB. KorzenH. PeschelC. ScholzJ. L. VuilleumierW. BrücknerY. MizunoH. EngelienD. Von HarrachT. LindqvistK. RöhrichMichele ArneodoQuentin IngramM. Van Der HeijdenR. Van DantzigC. A. HeuschG. BaumL. RopelewskiF. LettenströmJ. BeaufaysP. GrafströmKlaus RithM. TreichelChiara MariottiF. SeverN. PavelR. A. SchumacherM. De JongA. BrüllAmedeo StaianoM. BotjeH. DöbbelingG. Van MiddelkoopF. KleinJacek CiborowskiC. BrogginiJ. NassalskiA. SimonCristiana PeroniD. NowotnyRoland WindmoldersU. KrünerA. SandaczUlrich LandgrafA. ArvidsonBogdan PovhT.-a. ShibataU. SennhauserW. J. BurgerI. G. BirdR. RiegerP. AmaudruzK. JansonF. ZetscheS. KullanderJ. DomingoB. BadelekGeoffrey TaylorTjeerd KetelJ. DrinkardT. WalcherM.i. Ferrero

subject

PhysicsMomentum (technical analysis)MuonPhysics and Astronomy (miscellaneous)ScatteringStructure functionchemistry.chemical_elementElementary particle530Particle accelerationchemistryAtomic physicsEngineering (miscellaneous)Particle Physics - ExperimentHelium

description

We present the structure function ratiosF2He/F2D,F2C/F2D andF2Ca/F2D measured in deep inelastic muon-nucleus scattering at an incident muon momentum of 200 GeV. The kinematic range 0.0035<x<0.65 and 0.5<Q2<90 GeV2 is covered. At lowx the three ratios are significantly smaller than unity and the size of the depletion grows with decreasingx and increasing mass numberA. At intermediatex the ratios show an enhancement of about 2% above unity for C/D and Ca/D, possibly less for He/D. There are indications of someQ2 dependence in the Ca/D data. The integrals of the structure function differencesF2A−F2D are discussed.

https://doi.org/10.1007/bf01548560