Theoretical predictions for charm and bottom production at the LHC

Cacciari, Matteo; Frixione, Stefano; Houdeau, Nicolas; Mangano, M.; Nason, Paolo; Ridolfi, Giovanni

doi:10.1007/jhep10(2012)137

Cited by 549 publications

(699 citation statements)

References 97 publications

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“…We infer f (p B T ) from the fixed-order-next-to-leading-logarithm (FONLL) predictions in refs. [99][100][101]. This amounts to creating a probability density function by normalising dσ B /dp T to unity over a chosen p T range and then discretising to allow for numerical integration.…”

Section: Production Via B Decaysmentioning

confidence: 99%

Phenomenology of a very light scalar (100 MeV < m h < 10 GeV) mixing with the SM Higgs

Clarke

Foot

Volkas

2014

J. High Energ. Phys.

150

161

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In this paper we investigate the phenomenology of a very light scalar, h, with mass 100 MeV < m h < 10 GeV, mixing with the SM Higgs. As a benchmark model we take the real singlet scalar extension of the SM. We point out apparently unresolved uncertainties in the branching ratios and lifetime of h in a crucial region of parameter space for LHC phenomenology. Bounds from LEP, meson decays and fixed target experiments are reviewed. We also examine prospects at the LHC. For m h m B the dominant production mechanism is via meson decay; our main result is the calculation of the differential p T spectrum of h scalars originating from B mesons and the subsequent prediction of up to thousands of moderate (triggerable) p T displaced dimuons possibly hiding in the existing dataset at ATLAS/CMS or at LHCb. We also demonstrate that the subdominant V h production channel has the best sensitivity for m h m B and that future bounds in this region could conceivably compete with those of LEP.

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Section: Production Via B Decaysmentioning

confidence: 99%

Phenomenology of a very light scalar (100 MeV < m h < 10 GeV) mixing with the SM Higgs

Clarke

Foot

Volkas

2014

J. High Energ. Phys.

150

161

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“…The parameters of the blast-wave (flow velocity β, and freezeout temperature) were extracted from the fits to the identified particle p T distributions measured in d-Au [94] and p-Pb collisions [95], then the heavy-flavour meson spectra were determined using the extracted parameters and the D and B meson masses. In order to quantify the nuclear modification factor for heavy mesons expected from the blast wave, the nuclear modification factor with respect to the FONLL [34][35][36] the d+Au yield by the p+p yield from [23]. At higher transverse momentum, where the p+p heavy-flavor electron spectrum is consistent with a shape from pQCD, a fit to the spectral shape from the [24] calculations is used to represent the p+p yield.…”

Section: Vmentioning

confidence: 99%

“…The author Jamie Nagle fo ported by the U DE-AC02-98CH [95] and FONLL [34][35][36] heavy-meson spectra have been used to generate these results [93].…”

Section: Vmentioning

confidence: 99%

“…The partonic cross section dσ ij→Q(Q){k} is calculated as a perturbative series in the strong coupling α s , which depends on the energy scale of the process, indicated here as renormalization scale, µ R ; currently, calculations are performed up to next-to-leading order (NLO), O(α 3 s ) (MNR [28], GM-VFNS [29][30][31], MC@NLO [32,33]), or at fixed order with next-to-leading-log resummation (FONLL [34][35][36]). The Parton Distribution Function (PDF), f i (x 1 , µ 2 F ) encodes the partonic structure of the colliding protons and can be interpreted as the probability to find a parton i inside the proton with fraction of momentum x 1 = p i /p p (Bjorken x).…”

Section: Heavy-flavour Production In Pp Collisionsmentioning

confidence: 99%

“…the correction factor that accounts for the feed-down from B meson (see Equations (4.8) and (4.12) in Chapter 4), was evaluated using the B production cross section from the FONLL pQCD calculation [34][35][36], and the B → D 0 + X kinematics from the EvtGen package [118]. …”

Section: Correction For Feed-down From B Decaysmentioning

confidence: 99%

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Measurement of the D0 Meson Production in Pb–Pb and p–Pb Collisions

Festanti

2016

Springer Theses

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This thesis presents the measurement of the charmed D 0 meson production relative to the reaction plane in Pb-Pb collisions at the centre-of-mass energy per nucleon-nucleon collision of √ s NN = 2.76 TeV, and the measurement of the D 0 production in p-Pb collisions at √ s NN = 5.02 TeV with the ALICE detector at the CERN Large Hadron Collider.The D 0 azimuthal anisotropy with respect to the reaction plane is sensitive to the interaction of the charm quarks with the high-density strongly-interacting medium formed in ultra-relativistic heavy-ion collisions and, thus, to the properties of this state of matter. In particular, this observable allows to establish whether low-momentum charm quarks participate in the collective expansion of the system and whether they can reach thermal equilibrium with the medium constituents. The azimuthal anisotropy is quan- −0.036 in the interval 2 < p T < 6 GeV/c, which decreases towards more central collisions. Consequently, the nuclear modification factor shows a stronger suppression in the direction orthogonal to the reaction plane. The v 2 and the R AA measured in two azimuthal regions with respect to the reaction plane are compared to theoretical calculations of charm quark transport and energy loss in high-density strongly-interacting matter. The models that include substantial elastic interactions with an expanding medium provide a good description of the observed anisotropy.The D 0 nuclear modification factor R pPb in p-Pb collisions is compatible with unity within uncertainties. The measured R pPb is compared to theoretical models including initial state effects, as well as to the nuclear modification factor measured in central RiassuntoLa tesi presenta la misura della produzione di mesoni D 0 rispetto al piano di reazione in collisioni Pb-Pb all'energia nel centro di massa di √ s NN = 2.76 TeV per coppia di nucleoni e la misura della produzione di D 0 in collisioni p-Pb all'energia di √ s NN = 5.02 TeV con l'esperimento ALICE situato al Large Hadron Collider del CERN.L'anisotropia azimutale dei mesoni D 0 rispetto al piano di reazioneè sensibile alle interazioni del quark charm con il mezzo ad alta densità e fortemente interagente prodotto in collisioni tra ioni pesanti ad energia ultra-relativistica e, di conseguenza, alle proprietà di questo stato della materia. In particolare, permette di stabilire se i quark charm partecipano all'espansione collettiva del sistema e se raggiungono l'equilibrio termico con i costituenti del mezzo. L'anisotropia azimutaleè quantificata tramite il secondo coefficiente v 2 dello sviluppo in serie di Fourier della distribuzione azimutale dei mesoni D 0 e tramite la misura del fattore di modifica nucleare R AA nel piano di reazione e nella direzione ortogonale ad esso. La misura della produzione di D 0 in collisioni p-Pb permette di studiare gli effetti indotti dalla materia nucleare fredda, in modo da poterli distinguere da quelli indotti dal mezzo denso fortemente interagente prodotto in collisioni Pb-Pb.La produzione di mesoni D 0...

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Open Heavy-Flavour Measurements in Small Systems with ALICE at the LHC

Dhankher

2019

Springer Proceedings in Physics

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Theoretical predictions for charm and bottom production at the LHC

Cited by 549 publications

References 97 publications

Phenomenology of a very light scalar (100 MeV < m h < 10 GeV) mixing with the SM Higgs

Phenomenology of a very light scalar (100 MeV < m h < 10 GeV) mixing with the SM Higgs

Measurement of the D0 Meson Production in Pb–Pb and p–Pb Collisions

Open Heavy-Flavour Measurements in Small Systems with ALICE at the LHC

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