Ds+ meson production at central rapidity in proton–proton collisions at √s=7 TeV

B. Abelev; J. Adam; D. Adamová; Ian Bearden; Ante Bilandzic; Hans Bøggild; Christian Holm Christensen; Hans Hjersing Dalsgaard; Jens Jørgen Gaardhøje; Kristjan Herlache Gulbrandsen; Alexander Colliander Hansen; Børge Svane Nielsen; Casper Nygaard; Carsten Søgaard; Valentina Zaccolo

doi:10.1016/j.physletb.2012.10.049

D_s⁺meson production at central rapidity in proton–proton collisions at √s=7 TeV

B. Abelev, J. Adam, D. Adamová, Ian Bearden, Ante Bilandzic, Hans Bøggild, Christian Holm Christensen, Hans Hjersing Dalsgaard, Jens Jørgen Gaardhøje, Kristjan Herlache Gulbrandsen, Alexander Colliander Hansen, Børge Svane Nielsen, Casper Nygaard, Carsten Søgaard, Valentina Zaccolo

Experimental Particle Physics

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Abstract

The p_T-differential inclusive production cross section of the prompt charm-strange meson Ds+ in the rapidity range |y|<0.5 was measured in proton-proton collisions at s=7 TeV at the LHC using the ALICE detector. The analysis was performed on a data sample of 2.98×10⁸ events collected with a minimum-bias trigger. The corresponding integrated luminosity is L_int=4.8nb^-1. Reconstructing the decay Ds+→φπ+, with φ→K^-K⁺, and its charge conjugate, about 480 Ds± mesons were counted, after selection cuts, in the transverse momentum range 2<p_T<12GeV/c. The results are compared with predictions from models based on perturbative QCD. The ratios of the cross sections of four D meson species (namely D⁰, D⁺, D^*+ and D_s⁺) were determined both as a function of p_T and integrated over p_T after extrapolating to full p_T range, together with the strangeness suppression factor in charm fragmentation. The obtained values are found to be compatible within uncertainties with those measured by other experiments in e⁺e^-, ep and pp interactions at various centre-of-mass energies.

Original language	English
Journal	Physics Letters B: Particle Physics, Nuclear Physics and Cosmology
Volume	718
Issue number	2
Pages (from-to)	279-294
ISSN	0370-2693
DOIs	https://doi.org/10.1016/j.physletb.2012.10.049
Publication status	Published - 5 Dec 2012

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Ds+ meson production at central rapidity in proton–proton collisions at √s=7 TeVSubmitted manuscript, 296 KB

http://arxiv.org/pdf/1208.1948.pdf

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Abelev, B., Adam, J., Adamová, D., Bearden, I., Bilandzic, A., Bøggild, H., Christensen, C. H., Dalsgaard, H. H., Gaardhøje, J. J., Gulbrandsen, K. H., Hansen, A. C., Nielsen, B. S., Nygaard, C., Søgaard, C., & Zaccolo, V. (2012). D_s⁺meson production at central rapidity in proton–proton collisions at √s=7 TeV. Physics Letters B: Particle Physics, Nuclear Physics and Cosmology, 718(2), 279-294. https://doi.org/10.1016/j.physletb.2012.10.049

Abelev, B, Adam, J, Adamová, D, Bearden, I, Bilandzic, A, Bøggild, H , Christensen, CH, Dalsgaard, HH, Gaardhøje, JJ , Gulbrandsen, KH, Hansen, AC, Nielsen, BS, Nygaard, C, Søgaard, C & Zaccolo, V 2012, 'D_s⁺meson production at central rapidity in proton–proton collisions at √s=7 TeV', Physics Letters B: Particle Physics, Nuclear Physics and Cosmology, vol. 718, no. 2, pp. 279-294. https://doi.org/10.1016/j.physletb.2012.10.049

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title = "Ds+ meson production at central rapidity in proton–proton collisions at √s=7 TeV",

abstract = "The pT-differential inclusive production cross section of the prompt charm-strange meson Ds+ in the rapidity range |y|<0.5 was measured in proton-proton collisions at s=7 TeV at the LHC using the ALICE detector. The analysis was performed on a data sample of 2.98×108 events collected with a minimum-bias trigger. The corresponding integrated luminosity is Lint=4.8nb-1. Reconstructing the decay Ds+→φπ+, with φ→K-K+, and its charge conjugate, about 480 Ds± mesons were counted, after selection cuts, in the transverse momentum range 2T<12GeV/c. The results are compared with predictions from models based on perturbative QCD. The ratios of the cross sections of four D meson species (namely D0, D+, D*+ and Ds+) were determined both as a function of pT and integrated over pT after extrapolating to full pT range, together with the strangeness suppression factor in charm fragmentation. The obtained values are found to be compatible within uncertainties with those measured by other experiments in e+e-, ep and pp interactions at various centre-of-mass energies.",

author = "B. Abelev and J. Adam and D. Adamov{\'a} and Ian Bearden and Ante Bilandzic and Hans B{\o}ggild and Christensen, {Christian Holm} and Dalsgaard, {Hans Hjersing} and Gaardh{\o}je, {Jens J{\o}rgen} and Gulbrandsen, {Kristjan Herlache} and Hansen, {Alexander Colliander} and Nielsen, {B{\o}rge Svane} and Casper Nygaard and Carsten S{\o}gaard and Valentina Zaccolo",

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T1 - Ds+ meson production at central rapidity in proton–proton collisions at √s=7 TeV

AU - Abelev, B.

AU - Adam, J.

AU - Adamová, D.

AU - Bearden, Ian

AU - Bilandzic, Ante

AU - Bøggild, Hans

AU - Christensen, Christian Holm

AU - Dalsgaard, Hans Hjersing

AU - Gaardhøje, Jens Jørgen

AU - Gulbrandsen, Kristjan Herlache

AU - Hansen, Alexander Colliander

AU - Nielsen, Børge Svane

AU - Nygaard, Casper

AU - Søgaard, Carsten

AU - Zaccolo, Valentina

PY - 2012/12/5

Y1 - 2012/12/5

N2 - The pT-differential inclusive production cross section of the prompt charm-strange meson Ds+ in the rapidity range |y|<0.5 was measured in proton-proton collisions at s=7 TeV at the LHC using the ALICE detector. The analysis was performed on a data sample of 2.98×108 events collected with a minimum-bias trigger. The corresponding integrated luminosity is Lint=4.8nb-1. Reconstructing the decay Ds+→φπ+, with φ→K-K+, and its charge conjugate, about 480 Ds± mesons were counted, after selection cuts, in the transverse momentum range 2T<12GeV/c. The results are compared with predictions from models based on perturbative QCD. The ratios of the cross sections of four D meson species (namely D0, D+, D*+ and Ds+) were determined both as a function of pT and integrated over pT after extrapolating to full pT range, together with the strangeness suppression factor in charm fragmentation. The obtained values are found to be compatible within uncertainties with those measured by other experiments in e+e-, ep and pp interactions at various centre-of-mass energies.

AB - The pT-differential inclusive production cross section of the prompt charm-strange meson Ds+ in the rapidity range |y|<0.5 was measured in proton-proton collisions at s=7 TeV at the LHC using the ALICE detector. The analysis was performed on a data sample of 2.98×108 events collected with a minimum-bias trigger. The corresponding integrated luminosity is Lint=4.8nb-1. Reconstructing the decay Ds+→φπ+, with φ→K-K+, and its charge conjugate, about 480 Ds± mesons were counted, after selection cuts, in the transverse momentum range 2T<12GeV/c. The results are compared with predictions from models based on perturbative QCD. The ratios of the cross sections of four D meson species (namely D0, D+, D*+ and Ds+) were determined both as a function of pT and integrated over pT after extrapolating to full pT range, together with the strangeness suppression factor in charm fragmentation. The obtained values are found to be compatible within uncertainties with those measured by other experiments in e+e-, ep and pp interactions at various centre-of-mass energies.

U2 - 10.1016/j.physletb.2012.10.049

DO - 10.1016/j.physletb.2012.10.049

M3 - Journal article

SN - 0370-2693

VL - 718

SP - 279

EP - 294

JO - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

JF - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

IS - 2

ER -

Ds+ meson production at central rapidity in proton–proton collisions at √s=7 TeV

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D_s⁺meson production at central rapidity in proton–proton collisions at √s=7 TeV