Charm hadrons from fragmentation and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>decays in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>annihilation at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>10.6</mm

Seuster, R.; Abe, Kenji; Aihara, H.; Asano, Y.; Aushev, T.; Bakich, A. M.; Barbero, M.; Bedny, I.; Bitenc, U.; Bizjak, I.; Bożek, A.; Bračko, M.; Brodzicka, J.; Chen, A.; Cheon, B. G.; Choi, Y.; Chuvikov, A.; Cole, S.; Dalseno, J.; Danilov, M.; Dash, M.; Liu, Dong; Dragic, J.; Drutskoy, A.; Eidelman, S.; Fang, F.; Gershon, T.; Go, A.; Gokhroo, G.; Golob, B.; Gorišek, A.; Hayasaka, K.; Hazumi, M.; Hoshi, Y.; Hou, S.; Hou, W.-S.; Iijima, T.; Ikado, K.; Itoh, R.; Iwasaki, M.; Kang, J. H.; Kang, J. S.; Kapusta, P.; Katayama, N.; Kawai, Hiroyuki; Kawasaki, T.; Khan, H. R.; Kichimi, H.; Kim, H. J.; Kim, S. M.; Križan, P.; Krokovny, P.; Kulasiri, R.; Kuo, C. C.; Kuzmin, A.; Kwon, Y. J.; Lange, J. S.; Lesiak, T.; Li, J.; Lin, S. W.; Mandl, F.; Mitaroff, W.; Miyake, H.; Miyazaki, Y.; Mizuk, R.; Nagamine, T.; Nagasaka, Y.; Nakano, E.; Nakao, M.; Nishida, S.; Nitoh, O.; Ogawa, S.; Ohshima, T.; Okabe, T.; Okuno, S.; Olsen, S. L.; Onuki, Y.; Ozaki, H.; Pakhlov, P.; Pałka, H.; Park, C. W.; Park, H.; Park, K. S.; Pestotnik, R.; Piilonen, L. E.; Sakai, Y.; Sato, N.; Schietinger, T.; Schneider, O.; Schümann, J.; Schwanda, C.; Sevior, M. E.; Shibuya, H.; Sidorov, V.; Somov, A.; Soni, N.; Stamen, R.; Stanič, S.; Starič, M.; Suzuki, S.; Takasaki, F.; Tamai, K.; Tamura, N.; Tanaka, M.; Taylor, G. N.; Teramoto, Y.; Tian, X. C.; Uehara, S.; Uglov, T.; Ueno, K.; Uno, S.; Urquijo, P.; Varner, G.; Wang, C. C.; Wang, C. H.; Wang, M. Z.; Xie, Qingguo; Yabsley, B.; Yamaguchi, A.; Yamashita, Y.; Yamauchi, M.; Ying, J.; Yusa, Y.; Zhang, L. M.; Zhang, Z. P.; Zhilich, V.

doi:10.1103/physrevd.73.032002

Cited by 82 publications

(66 citation statements)

References 44 publications

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“…Table 3 gives the integrated cross-sections for D 0 , D + , D + s , and D * + mesons. The ratios of the cross-sections, with the D 0 and D + results re-evaluated in the kinematic region of the D + s and D * + measurements, can be compared with the ratios of the cross-sections measured at e + e − colliders operating at a centre-of-mass energy close to the Υ(4S) resonance [39][40][41]. A more precise comparison is made here by computing the ratios of cross-section-times-branching-fractions, σ(D) × B(D → f ), where the final states f are the same between the LHCb measurements and those made at e + e − experiments.…”

Section: Integrated Cross-sectionsmentioning

confidence: 99%

Measurements of prompt charm production cross-sections in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV

Aaij¹,

Beteta²,

Adeva³

et al. 2016

J. High Energ. Phys.

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132

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Production cross-sections of prompt charm mesons are measured with the first data from pp collisions at the LHC at a centre-of-mass energy of 13 TeV. The data sample corresponds to an integrated luminosity of 4.98 ± 0.19 pb −1 collected by the LHCb experiment. The production cross-sections of D 0 , D + , D + s , and D * + mesons are measured in bins of charm meson transverse momentum, p T , and rapidity, y, and cover the range 0 < p T < 15 GeV/c and 2.0 < y < 4.5. The inclusive cross-sections for the four mesons, including charge conjugation, within the range of 1 < p T < 8 GeV/c are found to bewhere the uncertainties are due to statistical and systematic uncertainties, respectively.Keywords: Charm physics, Forward physics, Hadron-Hadron scattering, Heavy quark production, QCD A Absolute cross-sections 20 B Cross-section ratios at different energies 24 C Cross-section ratios for different mesons 28The LHCb collaboration 38 IntroductionMeasurements of charm production cross-sections in proton-proton collisions are important tests of the predictions of perturbative quantum chromodynamics [1][2][3]. Predictions of charm meson cross-sections have been made at next-to-leading order using the generalized mass variable flavour number scheme (GMVFNS) [3][4][5][6][7][8] and at fixed order with next-to-leading-log resummation (FONLL) [1,2,[9][10][11][12]. These are based on a factorisation approach, where the cross-sections are calculated as a convolution of three terms: the parton distribution functions of the incoming protons; the partonic hard scattering rate, estimated as a perturbative series in the coupling constant of the strong interaction; and a fragmentation function that parametrises the hadronisation of the charm quark into a -1 - JHEP03(2016)159given type of charm hadron. The range of y and p T accessible to LHCb enables quantum chromodynamics calculations to be tested in a region where the momentum fraction, x, of the initial state partons can reach values below 10 −4 . In this region the uncertainties on the gluon parton density functions are large, exceeding 30% [1,13], and LHCb measurements can be used to constrain them. For example, the predictions provided in ref.[1] have made direct use of these constraints from LHCb data, taking as input a set of parton density functions that is weighted to match the LHCb measurements at √ s = 7 TeV.The charm production cross-sections are also important in evaluating the rate of highenergy neutrinos created from the decay of charm hadrons produced in cosmic ray interactions with atmospheric nuclei [1,14]. Such neutrinos constitute an important background for experiments such as IceCube Charm mesons produced at the pp collision point, either directly or as decay products of excited charm resonances, are referred to as promptly produced. No attempt is made to distinguish between these two sources. This paper presents measurements of the crosssections for the prompt production of D 0 , D + , D + s , and D * (2010) + (henceforth denoted as D * + ) mesons, based ...

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Section: Integrated Cross-sectionsmentioning

confidence: 99%

Measurements of prompt charm production cross-sections in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV

Aaij¹,

Beteta²,

Adeva³

et al. 2016

J. High Energ. Phys.

Self Cite

132

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show abstract

“…The results of the CLEO [1,2] and ARGUS [3][4][5] experiments are represented as a product of the charm-hadron cross-sections times decay branching ratios, σ (e + e − → H ) · B(H → daughters). The BELLE experiment [7] provided measurements of σ (e + e − → H ). The BABAR experiment [8] provided a measurement of an average number of…”

Section: Charm-quark Fragmentation Fractions From Measurements At B-fmentioning

confidence: 99%

“…[25]. The B(D * 0 → D 0 π 0 ) was calculated from the two most precise measurements [29,30] [25] 3 0 .70 ± 0.50, BELLE [7] D * + → D 0 π + 67.70 ± 0.50 [25] 6 8 .13 ± 1.40, ALEPH [11] 67.70 ± 0.50, ALICE [21][22][23] 55.00 ± 4.00, ARGUS [3][4][5] 67.70 ± 0.50, ATLAS [24] 67.70 ± 0.50, BELLE [7] 67.60 ± 0.50, H1 [18] 67.70 ± 0.50, ZEUS [14][15][16]33] 67.70 ± 0.50, LHCb [20] 68.30 ± 1.40, OPAL [9,10] D * 0 → D 0 100.00 [29,30] [6,8] D + → K − π + π + 9.46 ± 0.24 [25] 9 .13 ± 0.19, ALICE [21][22][23] 7.70 ± 1.00, ARGUS [3][4][5] 9.13 ± 0.19, ATLAS [24] 9.20 ± 0.60, BELLE [7] 9.00 ± 0.60, H1 [18] 9.51 ± 0.34, ZEUS [16,33] 9.20 ± 0.60, ZEUS [14] 9.13 ± 0.19, ZEUS [15] 9.13 ± 0.19, LHCb [19,20] D + → K 0 π + 1.53 ± 0.06 [25] D 0 → K − π + 3.93 ± 0.04 [25] 3 .85 ± 0.09, ALEPH [11] 3.87 ± 0.05, ALICE …”

Section: Update Of Input Measurements To Recent Branching Ratiosmentioning

confidence: 99%

“…The production of specific charm hadrons has been measured in different regimes and environments: in e + e − collisions at B-factories [1][2][3][4][5][6][7][8] and in Z decays [9][10][11][12][13], in e ± p collisions in photoproduction (PHP) [14,15], deep inelastic scattering (DIS) [16][17][18] and in pp collisions [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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Combined analysis of charm-quark fragmentation-fraction measurements

2016

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A summary of measurements of the fragmentation of charm quarks into a specific hadron is given. Measurements performed in photoproduction and deep inelastic scattering in e ± p, pp and e + e − collisions are compared, using up-to-date branching ratios. Within uncertainties, all measurements agree, supporting the hypothesis that fragmentation is independent of the specific production process. Averages of the fragmentation fractions over all measurements are presented. The average has significantly reduced uncertainties compared to individual measurements.

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“…The Kartvelishvili parameter, α, was parametrised [32] as a smooth function of the invariant mass of the cc system, M cc , to fit the measurements of the D * fragmentation function by ZEUS [33] and H1 [34]: α(M cc ) = 2.1 + 127/(M 2 cc − 4m 2 c ) (with m c and M cc in GeV). In addition, the mean value of the fragmentation function was scaled down by 0.95 since kinematic considerations [35] and direct measurements at Belle [36] and CLEO [37] show that, on average, the momentum of D + mesons is 5% lower than that of D * mesons. This is due to some of the D + mesons originating from D * decays.…”

Section: Theoretical Predictionsmentioning

confidence: 99%

Measurement of D ± production in deep inelastic ep scattering with the ZEUS detector at HERA

Abramowicz¹,

Abt²,

Adamczyk³

et al. 2013

J. High Energ. Phys.

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Charm production in deep inelastic ep scattering was measured with the ZEUS detector using an integrated luminosity of 354 pb −1 . Charm quarks were identified by reconstructing D ± mesons in the D ± → K ∓ π ± π ± decay channel. Lifetime information was used to reduce combinatorial background substantially. Differential cross sections were measured in the kinematic region 5 < Q 2 < 1000 GeV 2 , 0.02 < y < 0.7, 1.5 < p T (D ± ) < 15 GeV and |η(D ± )| < 1.6, where Q 2 is the photon virtuality, y is the inelasticity, and p T (D ± ) and η(D ± ) are the transverse momentum and the pseudorapidity of the D ± meson, respectively. Next-to-leading-order QCD predictions are compared to the data. The charm contribution, F cc 2 , to the proton structure-function F 2 was extracted.

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Charm hadrons from fragmentation andBdecays ine+e−annihilation ats=10.6

Cited by 82 publications

References 44 publications

Measurements of prompt charm production cross-sections in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV

Measurements of prompt charm production cross-sections in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV

Combined analysis of charm-quark fragmentation-fraction measurements

Measurement of D ± production in deep inelastic ep scattering with the ZEUS detector at HERA

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