Spin alignment and violation of the OZI rule in exclusive ω and ϕ production in pp collisions

Adolph, C.; Akhunzyanov, R.; Alexeev, M.; Alexeev, G. D.; Amoroso, A.; Andrieux, V.; Аносов, В.; Austregesilo, A.; Badełek, B.; Balestra, F.; Barth, J.; Baum, G.; Beck, R.; Bedfer, Y.; Берлин, А. А.; Bernhard, J.; Bicker, K.; Bieling, J.; Birsa, R.; Bisplinghoff, J.; Bodlak, M.; Boër, M.; Bordalo, P.; Bradamante, F.; Braun, C.; Bressan, A.; Büchele, M.; Burtin, E.; Capozza, L.; Chiosso, M.; Chung, S. U.; Cicuttin, A.; Crespo, M.L.; Curiel, Q.; Torre, S.; Dasgupta, S.; Денисов, О.; Donskov, S.V.; Doshita, N.; Duic, V.; Dünnweber, W.; Dziewiecki, M.; Efremov, A.; Elia, C.; Eversheim, P.D.; Eyrich, W.; Faessler, M.; Ferrero, A.; Filin, A.; Finger, M.; Fischer, H.; Franco, C.; Hohenesche, N. du Fresne von; Jm, Friedrich; Frolov, V. V.; Gautheron, F.; Gavrichtchouk, O.P.; Gerassimov, S.; Geyer, R.; Gnesi, I.; Gobbo, B.; Goertz, Stefan; Gorzellik, M.; Grabmüller, S.; Grasso, A.; Grube, B.; Grussenmeyer, T.; Guskov, A.; Guthörl, T.; Haas, Florian; Harrach, D. von; Hahne, D.; Hashimoto, Ryo; Heinsius, F. H.; Herrmann, F.; Hinterberger, F.; Höppner, C.; Horikawa, N.; d’Hose, N.; Huber, S.; Ishimoto, S.; Иванов, А.; Ivanshin, Yu.; Iwata, T.; Jahn, R.; Jarý, V.; Jasinski, P.; Joerg, P.; Joosten, R.; Kabuß, E.; Ketzer, B.; Khaustov, G.V.; Khokhlov, Yu.A.; Kisselev, Yu.; Клейн, Ф.; Klimaszewski, K.; Koivuniemi, J.H.; Kolosov, V.N.; Kondo, K.; Königsmann, K.; Konorov, I.; Константинов, В.Ф.; Kotzinian, A.M.; Kouznetsov, O.; Krämer, M.; Kroumchtein, Z.V.; Kuchinski, N.; Kunne, F.; Kurek, K.; Kurjata, R.; Lednev, A.A.; Lehmann, A.; Levillain, M.; Levorato, S.; Lichtenstadt, J.; Maggiora, A.; Magnon, A.; Makke, N.; Mallot, G.K.; Marchand, Claude; Martin, A.; Marzec, J.; Matoušek, Jan; Matsuda, Hiroki; Matsuda, T.; Meshcheryakov, G.; Meyer, W.; Michigami, T.; Mikhailov, Yu.V.; Miyachi, Y.; Nagaytsev, A.; Nagel, T.; Nerling, F.; Neubert, S.; Neyret, D.; Nikolaenko, V.; Nový, J.; Nowak, W.-D.; Nunes, A. S.; Оlshevsky, А.G.; Орлов, И.; Ostrick, M.; Panknin, R.; Panzieri, D.; Parsamyan, B.; Paul, S.; Platchkov, S.; Pochodzalla, J.; Polyakov, V.A.; Pretz, J.; Quaresma, M.; Quintans, C.; Ramos, S.; Regali, C.; Reicherz, G.; Rocco, E.; Rossiyskaya, N.S.; Ryabchikov, D.I.; Rychter, A.; Samoylenko, V.D.; Sandacz, A.; Sapozhnikov, M. G.; Sarkar, S.; Savin, I.; Sbrizzai, G.; Schiavon, P.; Schill, C.; Schlüter, T.; Schmidt, K.; Schmieden, H.; Schönning, K.; Schopferer, S.; Schott, M.; Shevchenko, O.Yu.; Silva, L.; Sinha, L.; Sirtl, S.; Slunečka, M.; Sosio, S.; Sozzi, F.; Srnka, A.; Steiger, L.; Stolarski, M.; Šulc, M.; Sulej, R.; Suzuki, Hiromasa; Szableski, A.; Szameitat, T.; Sznajder, P.; Takekawa, S.; Wolbeek, J. ter; Tessaro, S.; Tessarotto, F.; Thibaud, F.; Uhl, S.; Uman, I.; Virius, M.; Wang, L.; Weisrock, T.; Wilfert, M.; Windmolders, R.; Wollny, H.; Заремба, К.; Zavertyaev, M.; Zemlyanichkina, E.; Ziembicki, M.; Zink, A.

doi:10.1016/j.nuclphysb.2014.07.020

Cited by 5 publications

(2 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An important consequence of the factorization theorem is that the fragmentation function is independent of x, and the parton distribution function is independent of z, while both depend on Q 2 . In addition to azimuthal asymmetries in spin-independent SIDIS [9], the most relevant experimental observable to investigate spin-averaged TMD-PDFs and TMD-FFs is the differential hadron multiplicity as a function of P 2 hT , which is defined in Eq. (3) below.…”

Section: Introductionmentioning

confidence: 99%

Transverse-momentum-dependent multiplicities of charged hadrons in muon-deuteron deep inelastic scattering

Aghasyan¹,

Alexeev²,

Alexeev³

et al. 2018

Phys. Rev. D

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A semi-inclusive measurement of charged hadron multiplicities in deep inelastic muon scattering off an isoscalar target was performed using data collected by the COMPASS Collaboration at CERN. The following kinematic domain is covered by the data: photon virtuality Q 2 > 1 ðGeV=cÞ 2 , invariant mass of the hadronic system W > 5 GeV=c 2 , Bjorken scaling variable in the range 0.003 < x < 0.4, fraction of the virtual photon energy carried by the hadron in the range 0.2 < z < 0.8, and square of the hadron transverse momentum with respect to the virtual photon direction in the range 0.02 ðGeV=cÞ 2 < P 2 hT < 3 ðGeV=cÞ 2 . The multiplicities are presented as a function of P 2 hT in three-dimensional bins of x, Q 2 , z and compared to previous semi-inclusive measurements. We explore the small-P 2 hT region, i.e. P 2 hT < 1 ðGeV=cÞ 2 , where hadron transverse momenta are expected to arise from nonperturbative effects, and also the domain of larger P 2 hT , where contributions from higher-order perturbative QCD are expected to dominate. The multiplicities are fitted using a single-exponential function at small P 2 hT to study the dependence of the average transverse momentum hP 2 hT i on x, Q 2 and z. The power-law behavior of the multiplicities at large P 2 hT is investigated using various functional forms. The fits describe the data reasonably well over the full measured range.

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Section: Introductionmentioning

confidence: 99%

Transverse-momentum-dependent multiplicities of charged hadrons in muon-deuteron deep inelastic scattering

Aghasyan¹,

Alexeev²,

Alexeev³

et al. 2018

Phys. Rev. D

Self Cite

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“…Exclusive and diffractive production has been studied in lepton-hadron interactions, both at the FT experiments HERMES [231][232][233][234][235][236][237][238][239][240][241][242][243], COMPASS [244][245][246][247][248][249][250][251], and the experiments at Jefferson Lab [252][253][254][255][256][257][258][259][260][261][262][263][264], and at the collider experiments H1 (see, among others, [265][266][267][268][269][270][271][272][273][274][275][276][277][278][279]…”

Section: Selected Experimental Resultsmentioning

confidence: 99%

Prospects for quarkonium studies at the high-luminosity LHC

Chapon,

d'Enterria,

Ducloue

et al. 2020

Preprint

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We review the prospects for quarkonium-production studies in proton and nuclear collisions accessible during the upcoming phases of the CERN Large Hadron Collider operation after 2021, including the ultimate high-luminosity phase, with increased luminosities compared to LHC Runs 1 and 2. We address the current experimental and theoretical open issues in the field and the perspectives for future studies in quarkoniumrelated physics through the exploitation of the huge data samples to be collected in proton-proton, with integrated luminosities reaching up to L = 3 ab −1 , in proton-nucleus and in nucleus-nucleus collisions, both in the collider and fixed-target modes. Such investigations include, among others, those of: (i) the quarkonia produced in association with other hard particles; (ii) the χ Q and η Q down to small transverse momenta; (iii) the constraints brought in by quarkonia on gluon PDFs, nuclear PDFs, TMDs, GPDs and GTMDs, as well as on the low-x parton dynamics; (iv) the gluon Sivers effect in polarised-nucleon collisions; (v) the properties of the quark-gluon plasma produced in ultra-relativistic heavy-ion collisions and of collective partonic effects in general; and (vi) double and triple parton scatterings.

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