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  1. Article: The role of multi-parton interactions in doubly-heavy hadron production.

    Egede, U / Hadavizadeh, T / Singla, M / Skands, P / Vesterinen, M

    The European physical journal. C, Particles and fields

    2022  Volume 82, Issue 9, Page(s) 773

    Abstract: Beauty and charm quarks are ideal probes of pertubative Quantum Chromodymanics in proton-proton collisions, owing to their large masses. In this paper the role of multi-parton interactions in the production of doubly-heavy hadrons is studied using ... ...

    Abstract Beauty and charm quarks are ideal probes of pertubative Quantum Chromodymanics in proton-proton collisions, owing to their large masses. In this paper the role of multi-parton interactions in the production of doubly-heavy hadrons is studied using simulation samples generated with Pythia, a Monte Carlo event generator. Comparisons are made to the stand-alone generators BcVegPy and GenXicc. New methods of speeding up Pythia simulations for events containing heavy quarks are described, enabling the production of large samples with multiple heavy-quark pairs. We show that significantly higher production rates of doubly-heavy hadrons are predicted in models that allow heavy quarks originating from different parton-parton interactions (within the same hadron-hadron collision) to combine to form such hadrons. Quantitative predictions are sensitive to the modelling of colour reconnections. We suggest a set of experimental measurements capable of differentiating these additional contributions.
    Language English
    Publishing date 2022-09-01
    Publishing country France
    Document type Journal Article
    ZDB-ID 1459069-4
    ISSN 1434-6052 ; 1434-6044
    ISSN (online) 1434-6052
    ISSN 1434-6044
    DOI 10.1140/epjc/s10052-022-10710-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: The effect of fish life-history structures on the topologies of aquatic food webs

    Vesterinen, Milko / Perälä, Tommi / Kuparinen, Anna

    Food webs. 2021 Dec., v. 29

    2021  

    Abstract: Biological organisms can vastly change their ecological functionality due to changes in body size and diet across their life. Consequently, it has been increasingly recognized that to attain sufficient biological realism, food webs may need to include ... ...

    Abstract Biological organisms can vastly change their ecological functionality due to changes in body size and diet across their life. Consequently, it has been increasingly recognized that to attain sufficient biological realism, food webs may need to include life-history structures. The objective of the work is to study theoretically whether and how the inclusion of life-history structures affects the food web topology. Topological research was done by applying network theory metrics for three different food web types with two different sizes that were generated by using the niche-model. The dynamical modeling was performed by using an allometric trophic network modeling approach. The different types included food webs with and without the life-history structure for top predators (three fish species). Each of the generated random food webs analyzed reached dynamical equilibrium conditions with respect to the biomass densities of the species prior to the network analysis. Our results suggest that food web topologies are not largely affected by the inclusion of age- or stage-structure. In addition to the topological study, the relationship between the metrics used in this work was investigated by using Pearson correlation. Results suggested that only a few pairs of metrics had a strong positive correlation and most of the correlations did not change with food web size or type.
    Keywords allometry ; biomass ; body size ; diet ; fish ; life history ; network theory ; topology
    Language English
    Dates of publication 2021-12
    Publishing place Elsevier Inc.
    Document type Article
    ISSN 2352-2496
    DOI 10.1016/j.fooweb.2021.e00213
    Database NAL-Catalogue (AGRICOLA)

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  3. Book ; Online ; Thesis: Z Boson Transverse Momentum Distribution, and ZZ and WZ Production

    Vesterinen, Mika

    measurements Using 7.3 - 8.6 fb-1 of p¯p Collisions at √s=1.96 TeV

    (Springer Theses)

    2012  

    Abstract: This work develops novel data analysis techniques enabling aspects of the Standard Model of particle physics to be tested with unprecedented precision using data from the DZero experiment at the high energy "Tevatron” proton-antiproton collider at ... ...

    Author's details Mika Vesterinen
    Series title Springer Theses
    Abstract This work develops novel data analysis techniques enabling aspects of the Standard Model of particle physics to be tested with unprecedented precision using data from the DZero experiment at the high energy "Tevatron” proton-antiproton collider at Fermilab, Chicago. Vesterinen's measurements of the transverse momentum of Z bosons using the novel variable f* have exposed deficiencies in the current state-of-the-art theoretical predictions for vector boson production at hadron colliders. These techniques are now being used in the experiments at CERN’s Large Hadron Collider (LHC) and have stimulated considerable interest in the theoretical particle physics community. Furthermore, Vesterinen's measurements of the cross sections for the production of pairs of vector bosons (WZ and ZZ) are to date the most precise ever made.
    Keywords Mathematical physics ; Physics ; Quantum theory ; Technik / Wissen Physik
    Language English
    Size Online-Ressource, digital
    Publisher Springer
    Publishing place Berlin, Heidelberg
    Document type Book ; Online ; Thesis
    Thesis / German Habilitation thesis Univ., Diss.--Manchester, 2012
    Note Description based upon print version of record
    ISBN 9783642307874 ; 9783642307881 ; 3642307876 ; 3642307884
    DOI 10.1007/978-3-642-30788-1
    Database Former special subject collection: coastal and deep sea fishing

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  4. Book ; Online ; Thesis: Z Boson Transverse Momentum Distribution, and ZZ and WZ Production

    Vesterinen, Mika

    measurements Using 7.3 - 8.6 fb-1 of p¯p Collisions at √s=1.96 TeV

    (Springer Theses)

    2012  

    Abstract: This work develops novel data analysis techniques enabling aspects of the Standard Model of particle physics to be tested with unprecedented precision using data from the DZero experiment at the high energy "Tevatron” proton-antiproton collider at ... ...

    Author's details Mika Vesterinen
    Series title Springer Theses
    Abstract This work develops novel data analysis techniques enabling aspects of the Standard Model of particle physics to be tested with unprecedented precision using data from the DZero experiment at the high energy "Tevatron” proton-antiproton collider at Fermilab, Chicago. Vesterinen's measurements of the transverse momentum of Z bosons using the novel variable f* have exposed deficiencies in the current state-of-the-art theoretical predictions for vector boson production at hadron colliders. These techniques are now being used in the experiments at CERN’s Large Hadron Collider (LHC) and have stimulated considerable interest in the theoretical particle physics community. Furthermore, Vesterinen's measurements of the cross sections for the production of pairs of vector bosons (WZ and ZZ) are to date the most precise ever made.
    Keywords Mathematical physics ; Physics ; Quantum theory ; Technik / Wissen Physik
    Language English
    Size Online-Ressource, digital
    Publisher Springer
    Publishing place Berlin, Heidelberg
    Document type Book ; Online ; Thesis
    Thesis / German Habilitation thesis Univ., Diss.--Manchester, 2012
    Note Description based upon print version of record
    ISBN 9783642307874 ; 9783642307881 ; 3642307876 ; 3642307884
    DOI 10.1007/978-3-642-30788-1
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  5. Book ; Online: Understanding and constraining the PDF uncertainties in a W boson mass measurement with LHCb

    Farry, Stephen / Lupton, Olli / Pili, Martina / Vesterinen, Mika

    2019  

    Abstract: Precision electroweak tests are a powerful probe of physics beyond the Standard Model, but the sensitivity is limited by the precision with which the $W$ boson mass ($M_W$) has been measured. The Parton Distribution Function (PDF) uncertainties are a ... ...

    Abstract Precision electroweak tests are a powerful probe of physics beyond the Standard Model, but the sensitivity is limited by the precision with which the $W$ boson mass ($M_W$) has been measured. The Parton Distribution Function (PDF) uncertainties are a potential limitation for measurements of $M_W$ with LHC data. It has recently been pointed out that, thanks to LHCb's unique forward rapidity acceptance, a new measurement of $M_W$ by LHCb can improve this situation. While the measurement of $M_W$ by LHCb would also be susceptible to uncertainties in the PDFs, there would be a partial cancellation of the overall PDF uncertainty when the LHCb result is included in an average with measurements by ATLAS and CMS. Here we report on a detailed study on the mechanism driving the PDF uncertainty in the LHCb measurement of $M_W$, and propose an approach which should reduce this uncertainty by roughly a factor of two using LHCb Run 2 data.

    Comment: 18 pages, 17 figures
    Keywords High Energy Physics - Experiment ; High Energy Physics - Phenomenology
    Subject code 621
    Publishing date 2019-02-12
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  6. Article: Prospects for improving the LHC W boson mass measurement with forward muons.

    Bozzi, Giuseppe / Citelli, Luca / Vesterinen, Mika / Vicini, Alessandro

    The European physical journal. C, Particles and fields

    2015  Volume 75, Page(s) 601

    Abstract: Measurements of ... ...

    Abstract Measurements of the
    Language English
    Publishing date 2015-12-17
    Publishing country France
    Document type Journal Article
    ZDB-ID 1459069-4
    ISSN 1434-6052 ; 1434-6044
    ISSN (online) 1434-6052
    ISSN 1434-6044
    DOI 10.1140/epjc/s10052-015-3810-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Book ; Online: LHCb trigger streams optimization

    Derkach, D. / Kazeev, N. / Neychev, R. / Panin, A. / Trofimov, I. / Ustyuzhanin, A. / Vesterinen, M.

    2017  

    Abstract: The LHCb experiment stores around $10^{11}$ collision events per year. A typical physics analysis deals with a final sample of up to $10^7$ events. Event preselection algorithms (lines) are used for data reduction. Since the data are stored in a format ... ...

    Abstract The LHCb experiment stores around $10^{11}$ collision events per year. A typical physics analysis deals with a final sample of up to $10^7$ events. Event preselection algorithms (lines) are used for data reduction. Since the data are stored in a format that requires sequential access, the lines are grouped into several output file streams, in order to increase the efficiency of user analysis jobs that read these data. The scheme efficiency heavily depends on the stream composition. By putting similar lines together and balancing the stream sizes it is possible to reduce the overhead. We present a method for finding an optimal stream composition. The method is applied to a part of the LHCb data (Turbo stream) on the stage where it is prepared for user physics analysis. This results in an expected improvement of 15% in the speed of user analysis jobs, and will be applied on data to be recorded in 2017.

    Comment: Submitted to CHEP-2016 proceedings
    Keywords Computer Science - Distributed ; Parallel ; and Cluster Computing ; High Energy Physics - Experiment
    Publishing date 2017-02-17
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Cosmic neutrino last scattering surface.

    Dodelson, Scott / Vesterinen, Mika

    Physical review letters

    2009  Volume 103, Issue 17, Page(s) 171301

    Abstract: Neutrinos decoupled from the rest of the cosmic plasma when the Universe was less than one second old, far earlier than the photons, which decoupled at t = 380,000 years. Surprisingly, though, the last scattering surface of massive neutrinos is much ... ...

    Abstract Neutrinos decoupled from the rest of the cosmic plasma when the Universe was less than one second old, far earlier than the photons, which decoupled at t = 380,000 years. Surprisingly, though, the last scattering surface of massive neutrinos is much closer to us than that of the photons. Here we calculate the properties of the last scattering surfaces of the three species of neutrinos.
    Language English
    Publishing date 2009-10-23
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.103.171301
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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  9. Article ; Online: Extended storage of whole blood before the preparation of blood components: in vitro effects on red blood cells in Erythro-Sol environment.

    Gulliksson, H / Vesterinen, M / Payrat, J-M / Mayaudon, V

    Vox sanguinis

    2009  Volume 96, Issue 3, Page(s) 199–205

    Abstract: Background and objectives: Routine procedures for extended storage of whole blood (WB) before the preparation of blood components are of interest primarily for logistical reasons. We stored red cell units in either Erythro-Sol 2 (E-Sol 2, test units, ... ...

    Abstract Background and objectives: Routine procedures for extended storage of whole blood (WB) before the preparation of blood components are of interest primarily for logistical reasons. We stored red cell units in either Erythro-Sol 2 (E-Sol 2, test units, 150 ml added) or in saline-adenine-glucose-mannitol (SAG-M) (reference units, 100 ml added) that were prepared after storage of WB at room temperature for 8, 12, 16 or 19 h after blood collection.
    Study design and methods: Red blood cells were stored for 42 days. We measured pH, glucose, lactate, haemolysis, red blood cell adenosine triphosphate and 2,3-diphosphoglycerate on days 1, 7, 14, 21, 28, 35 and 42.
    Results: Haematocrits were significantly lower in E-Sol 2 than in SAG-M due to the higher volume of E-Sol 2 added compared to SAG-M. Significantly reduced levels were found in E-Sol 2 of extracellular pH (throughout storage after 8-h hold and initially after 12-, 16- or 19-h hold), of lactate (initially after 8-h hold and throughout storage after 12-, 16- or 19-h hold), and of haemolysis from day 35 in the 8-h and on day 42 in the 12-h hold group. Significantly increased levels of adenosine triphosphate were seen in E-Sol 2 after 8-h hold (from day 14) and after 12-h hold (at days 21, 35 and 42) compared to SAG-M. Significantly higher concentrations of 2,3-diphosphoglycerate were noticed primarily after 8-h hold of WB.
    Conclusion: The use of E-Sol 2 as a replacement for SAG-M does not significantly improve in vitro data after extended storage of WB at room temperature before preparation of blood components. However, after 8-h hold in vitro characteristics similar to or better than in fresh blood will be maintained for several weeks in E-Sol 2, a situation that makes E-Sol 2 superior to SAG-M when storage of WB is limited to 8 h. Some improvement was noted after 12-h hold as well.
    MeSH term(s) Blood Component Removal/methods ; Blood Preservation/instrumentation ; Blood Preservation/methods ; Erythrocytes/cytology ; Erythrocytes/metabolism ; Humans ; Time Factors
    Language English
    Publishing date 2009-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 80313-3
    ISSN 1423-0410 ; 0042-9007
    ISSN (online) 1423-0410
    ISSN 0042-9007
    DOI 10.1111/j.1423-0410.2008.01152.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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  10. Article: Wine, alcohol, and oral health, with special emphasis on dental erosion.

    Meurman, J H / Vesterinen, M

    Quintessence international (Berlin, Germany : 1985)

    2000  Volume 31, Issue 10, Page(s) 729–733

    Abstract: Wine is an essential component of the Mediterranean diet. Its consumption is increasing in many industrialized countries due to effective marketing. Wine may also have effects in the oral cavity mainly due to its acidity and alcohol content. This article ...

    Abstract Wine is an essential component of the Mediterranean diet. Its consumption is increasing in many industrialized countries due to effective marketing. Wine may also have effects in the oral cavity mainly due to its acidity and alcohol content. This article briefly describes some effects of wine, both beneficial and detrimental, on oral and general health. In particular, the effect of wine on tooth enamel is demonstrated.
    MeSH term(s) Alcohol Drinking/adverse effects ; Alcoholism/complications ; Coronary Disease/etiology ; Dental Enamel/pathology ; Developed Countries ; Diet ; Humans ; Incidence ; Mouth Diseases/etiology ; Mouth Mucosa/pathology ; Time Factors ; Tooth Erosion/etiology ; Wine/adverse effects ; Wine/classification
    Language English
    Publishing date 2000-11
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 7436-6
    ISSN 1936-7163 ; 0033-6572
    ISSN (online) 1936-7163
    ISSN 0033-6572
    Database MEDical Literature Analysis and Retrieval System OnLINE

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