Improving quark flavor separation with forward W and Z production at LHCb

Rojo, Juan

doi:10.22323/1.297.0198

Cited by 5 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…-Differential distributions for on-peak W and Z boson production in the forward region, 2.0 ≤ η l ≤ 4.5, covered by detectors with large acceptance, including forward rapidity. These measure-ments constrain quark flavour separation, including the strange and charm content of the proton, in the large and small x region [553]. -The inclusive production of jets in different bins of rapidity (both in the central and forward region) as a function of p jet T .…”

Section: Hl-lhc Measurements For Pdf Studiesmentioning

confidence: 99%

Standard Model Physics at the HL-LHC and HE-LHC

Azzi¹,

Farry²,

Nason³

et al. 2019

Preprint

View full text Add to dashboard Cite

The successful operation of the Large Hadron Collider (LHC) and the excellent performance of the ATLAS, CMS, LHCb and ALICE detectors in Run-1 and Run-2 with pp collisions at center-of-mass energies of 7, 8 and 13 TeV as well as the giant leap in precision calculations and modeling of fundamental interactions at hadron colliders have allowed an extraordinary breadth of physics studies including precision measurements of a variety physics processes. The LHC results have so far confirmed the validity of the Standard Model of particle physics up to unprecedented energy scales and with great precision in the sectors of strong and electroweak interactions as well as flavour physics, for instance in top quark physics. The upgrade of the LHC to a High Luminosity phase (HL-LHC) at 14 TeV center-of-mass energy with 3 ab −1 of integrated luminosity will probe the Standard Model with even greater precision and will extend the sensitivity to possible anomalies in the Standard Model, thanks to a ten-fold larger data set, upgraded detectors and expected improvements in the theoretical understanding. This document summarises the physics reach of the HL-LHC in the realm of strong and electroweak interactions and top quark physics, and provides a glimpse of the potential of a possible further upgrade of the LHC to a 27 TeV pp collider, the High-Energy LHC (HE-LHC), assumed to accumulate an integrated luminosity of 15 ab −1 .

show abstract

Section: Hl-lhc Measurements For Pdf Studiesmentioning

confidence: 99%

Standard Model Physics at the HL-LHC and HE-LHC

Azzi¹,

Farry²,

Nason³

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…• The differential distributions for on-peak W and Z boson production in the forward region, 2.0 ≤ η l ≤ 4.5, covered by the LHCb experiment. These measurements constrain quark flavour separation, including the strange and charm content of the proton, in the large and small x region [48], complementary to the data from the central region.…”

Section: Pdf-sensitive Processesmentioning

confidence: 83%

Towards ultimate parton distributions at the high-luminosity LHC

et al. 2018

Self Cite

View full text Add to dashboard Cite

Since its start of data taking, the LHC has provided an impressive wealth of information on the quark and gluon structure of the proton. Indeed, modern global analyses of parton distribution functions (PDFs) include a wide range of LHC measurements of processes such as the production of jets, electroweak gauge bosons, and top quark pairs. In this work, we assess the ultimate constraining power of LHC data on the PDFs that can be expected from the complete dataset, in particular after the High-Luminosity (HL) phase, starting in around 2025. The huge statistics of the HL-LHC, delivering to ATLAS and CMS and to LHCb, will lead to an extension of the kinematic coverage of PDF-sensitive measurements as well as to an improvement in their statistical and systematic uncertainties. Here we generate HL-LHC pseudo-data for different projections of the experimental uncertainties, and then quantify the resulting constraints on the PDF4LHC15 set by means of the Hessian profiling method. We find that HL-LHC measurements can reduce PDF uncertainties by up to a factor of 2 to 4 in comparison to state-of-the-art fits, leading to few-percent uncertainties for important observables such as the Higgs boson transverse momentum distribution via gluon-fusion. Our results illustrate the significant improvement in the precision of PDF fits achievable from hadron collider data alone, and motivate the continuation of the ongoing successful program of PDF-sensitive measurements by the LHC collaborations.

show abstract

“…the PDF region with low Bjorken-x values is accessible only to LHCb, due to its forward acceptance [5]. Moreover, the knowledge of the inclusive b and c quarks production rate from QCD processes is necessary to understand the background contributions in searches for massive particles decaying into b or c quarks, such as the Higgs boson or new heavy particles.…”

Section: Jhep02(2021)023mentioning

confidence: 99%

Measurement of differential $$ b\overline{b} $$- and $$ c\overline{c} $$-dijet cross-sections in the forward region of pp collisions at $$ \sqrt{s} $$ = 13 TeV

Aaij

Beteta²,

Ackernley³

et al. 2021

J. High Energ. Phys.

View full text Add to dashboard Cite

The inclusive $$ b\overline{b} $$ b b ¯ - and $$ c\overline{c} $$ c c ¯ -dijet production cross-sections in the forward region of pp collisions are measured using a data sample collected with the LHCb detector at a centre-of-mass energy of 13 TeV in 2016. The data sample corresponds to an integrated luminosity of 1.6 fb−1. Differential cross-sections are measured as a function of the transverse momentum and of the pseudorapidity of the leading jet, of the rapidity difference between the jets, and of the dijet invariant mass. A fiducial region for the measurement is defined by requiring that the two jets originating from the two b or c quarks are emitted with transverse momentum greater than 20 GeV/c, pseudorapidity in the range 2.2 < η < 4.2, and with a difference in the azimuthal angle between the two jets greater than 1.5. The integrated $$ b\overline{b} $$ b b ¯ -dijet cross-section is measured to be 53.0 ± 9.7 nb, and the total $$ c\overline{c} $$ c c ¯ -dijet cross-section is measured to be 73 ± 16 nb. The ratio between $$ c\overline{c} $$ c c ¯ - and $$ b\overline{b} $$ b b ¯ -dijet cross-sections is also measured and found to be 1.37 ± 0.27. The results are in agreement with theoretical predictions at next-to-leading order.

show abstract

Improving quark flavor separation with forward W and Z production at LHCb

Cited by 5 publications

References 24 publications

Standard Model Physics at the HL-LHC and HE-LHC

Standard Model Physics at the HL-LHC and HE-LHC

Towards ultimate parton distributions at the high-luminosity LHC

Measurement of differential $$ b\overline{b} $$- and $$ c\overline{c} $$-dijet cross-sections in the forward region of pp collisions at $$ \sqrt{s} $$ = 13 TeV

Contact Info

Product

Resources

About