Publication
$K^-/K^+$ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual photon energy
| dc.contributor.author | Nunes, Ana Sofia | |
| dc.date.accessioned | 2019-02-05T16:59:00Z | |
| dc.date.available | 2019-02-05T16:59:00Z | |
| dc.date.issued | 2018-08-01 | |
| dc.date.updated | 2019-02-05T16:59:00Z | |
| dc.description.abstract | For the first time, the $K^-/K^+$ multiplicity ratio is measured in deep-inelastic scattering for kaons carrying a large fraction $z$ of the virtual-photon energy. The data were obtained by the COMPASS collaboration using a 160 GeV muon beam and an isoscalar $^6$LiD target. The regime of deep-inelastic scattering is ensured by requiring $Q^2>1$ (GeV/$c)^2$ for the photon virtuality and $W>5$ GeV/$c^2$ for the invariant mass of the produced hadronic system. The Bjorken scaling variable range is $0.01<x<0.40$. The $z$-dependence of the multiplicity ratio is studied for $z>0.75$. For very large values of $z$, {\it i.e.} $z>0.8$, the results contradict expectations obtained using the formalism of (next-to-)leading order perturbative quantum chromodynamics. Our studies suggest that, within this formalism, an additional correction may be required to take into account the phase space available for hadronisation. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | PoS DIS2018 (2018) 018; DOI 10.22323/1.316.0018 | |
| dc.identifier.uri | http://dx.doi.org/10.22323/1.316.0018 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/27731 | |
| dc.language.iso | eng | |
| dc.title | $K^-/K^+$ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual photon energy | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |