Measurement of D* photoproduction at three different centre-of-mass energies at HERA

Abramowicz, H.; Abt, I.; Adamczyk, L.; Adamus, M.; Aggarwal, R.; Antonelli, S.; Arslan, O.; Aushev, V.; Aushev, Y.; Bachynska, O.; Barakbaev, A. N.; Bartosik, N.; Behnke, O.; Behr, J.; Behrens, U.; Bertolin, A.; Bhadra, S.; Bloch, I.; Bokhonov, V.; Boos, E.G.; Borras, K.; Brock, I.; Brugnera, R.; Bruni, A.; Brzozowska, B.; Bussey, P.; Caldwell, A.; Capua, M.; Catterall, C. D.; Chwastowski, J. J.; Ciborowski, J.; Ciesielski, R.; Cooper-Sarkar, A.M.; Corradi, M.; Corriveau, F.; D’Agostini, G.; Dementiev, R. K.; Devenish, R.C.E.; Dolinska, G.; Drugakov, V.; Dusini, S.; Ferrando, J.; Figiel, J.; Foster, B.; Gach, G. P.; Garfagnini, A.; Geiser, A.; Gizhko, A.; Gladilin, L. K.; Gogota, O.; Golubkov, Yu. A.; Grebenyuk, J.; Gregor, I. M.; Grzelak, G.; Gueta, O.; Guzik, M. P.; Hain, W.; Hartner, G.; Hochman, D.; Hori, R.; Ibrahim, Zainol Abidin; Iga, Y.; Ishitsuka, M.; Iudin, A.; Januschek, F.; Каденко, І.; Kananov, S.; Kanno, T.; Karshon, U.; Kaur, M.; Kaur, P.; Khein, L. A.; Kisielewska, D.; Klanner, R.; Klein, U.; Kondrashova, N.; Kononenko, O.; Korol, Ie.; Korzhavina, I. A.; Kotański, A.; Kötz, U.; Kovalchuk, N.; Kowalski, H.; Kuprash, O.; Kuze, M.; Levchenko, B. B.; Levy, A.; Libov, V.; Limentani, S.; Lisovyi, M.; Lobodzinska, E.; Lohmann, W.; Löhr, B.; Lohrmann, E.; Longhin, A.; Lontkovskyi, D.; Lukina, O. Yu.; Maeda, J.; Makarenko, I.; Malka, J.; Martin, J. F.; Mergelmeyer, S.; Idris, F. Mohamad; Mujkic, K.; Myronenko, V.; Nagano, K.; Nigro, A.; Nobe, T.; Notz, D.; Nowak, R. J.; Olkiewicz, K.; Onishchuk, Y.; Paul, E.; Perlański, W.; Perrey, H.; Pokrovskiy, N. S.; Proskuryakov, A.S.; Przybycien, M.; Raval, A.; Roloff, Philipp; Rubinsky, I.; Ruspa, M.; Samojlov, V.; Saxon, D. H.; Schioppa, M.; Schmidke, W. B.; Schneekloth, U.; Schörner-Sadenius, T.; Schwartz, J.; Shcheglova, L.M.; Shevchenko, R.; Shkola, O.; Singh, Inderpal; Skillicorn, I. O.; Słomiński, W.; Sola, V.; Solano, A.; Спиридонов, А.; Stančo, L.; Stefaniuk, N.; Stern, A.; Stewart, T. P.; Stopa, P.; Sztuk-Dambietz, J.; Szuba, D.; Szuba, J.; Tassi, E.; Temiraliev, T.; Tokushuku, K.; Tomaszewska, J.; Trofymov, A.; Trusov, V.; Tsurugai, T.; Turcato, M.; Turkot, O.; Tymieniecka, T.; Verbytskyi, A.; Viazlo, O.; Walczak, R.; Abdullah, W. A. T. Wan; Wichmann, K.; Wing, M.; Wolf, G.; Yamada, S.; Yamazaki, Y.; Zakharchuk, N.; Żarnecki, A.F.; Zawiejski, L.; Zenaiev, O.; Zhautykov, B.O.; Zhmak, N.; Zotkin, D.S.

doi:10.48550/arxiv.1405.5068

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reason is a rather low efficiency of selecting events with charm production. For example, the total number of events with charm identified in the ZEUS study was 11000 D * events corresponding to a handful of MPI events of the type we discuss [39].…”

mentioning

confidence: 95%

See 1 more Smart Citation

Double parton interactions in $$\gamma p, \gamma A$$ γ p , γ A collisions in the direct photon kinematics

Blok

Strikman

2014

Eur. Phys. J. C

View full text Add to dashboard Cite

We derive expressions for the differential distributions and the total cross section of the double-parton interaction in direct photon interaction with proton and nuclei. We demonstrate that in this case the cross section is more directly related to the nucleon generalized parton distribution than in the case of double-parton interactions in the proton-proton collisions. We focus on the production of two dijets each containing charm (anticharm) quarks and carrying x 1 , x 2 > 0.2 fractions of the photon momentum. Numerical results are presented for the e-p collisions at LHeC, HERA, and for the ultraperipheral A A and p A collisions at the LHC. We find that the events of this kind would be abundantly produced at the LHeC. For √ s = 1.3 TeV the expected rate is 2 × 10 9 events for 1 year (10 7 s) of running and the luminosity 10 34 cm −2 s −1 , for the transverse cutoff of p t > 5 GeV. This would make it feasible to use these processes for the model independent determination of two parton GPDs in nucleon and in nuclei. We also find that a significant number of such double-parton interactions should be produced in p-Pb and Pb-Pb collisions at the LHC: ∼6 × 10 4 for Pb-Pb, and ∼7 × 10 3 for p-Pb collisions for the same transverse momentum cutoff and running time 10 6 s, and in HERA where 1.2 × 10 5 events were produced for the integrated HERA luminosity of 1.2 fb −1 . Further studies are necessary to identify the kinematics where these MPIs could be separated from conventional 2-to-4 multijet events.

show abstract

mentioning

confidence: 95%

“…In principle a large number of events in the discussed kinematics was produced at HERA: ∼ 1.2 • 10 5 for the total luminosity 1 fb −1 . However the efficiency of the detection of D * was pretty low [39] so it appears that it would be very difficult to study the discussed process using the HERA data.…”

Section: Introductionmentioning

confidence: 99%

Double parton interactions in $$\gamma p, \gamma A$$ γ p , γ A collisions in the direct photon kinematics

Blok

Strikman

2014

Eur. Phys. J. C

View full text Add to dashboard Cite

show abstract

“…The centre-of-mass energy of all data taken up to 1997 (6 th column) was 300 GeV, while it was 318 -319 GeV for all subsequent runs, with the exception of the analyses marked "MER" and "LER" (entry 16), for which the data were taken at 251 and 225 GeV. Figure 27(right) shows the latest HERA measurement in photoproduction [180] (entry 16 in Table 3), focusing on the dependence of the inclusive visible cross section on the centre-of-mass energy. This makes use of the very last HERA running period, in which the proton beam energy was lowered.…”

Section: Charm Total Cross Sectionsmentioning

confidence: 99%

“…The data shown are from the first H1 and ZEUS publications on open charm production and from previous fixed-target experiments. Right: Inclusive charm-photoproduction cross section as a function of ep centre-of-mass energy[180], normalised to the cross section at 318 GeV.…”

mentioning

confidence: 99%

Charm, beauty and top at HERA

Behnke

Geiser

Lisovyi

2015

Progress in Particle and Nuclear Physics

Self Cite

View full text Add to dashboard Cite

a b s t r a c tResults on open charm and beauty production and on the search for top production in high-energy electron-proton collisions at HERA are reviewed. This includes a discussion of relevant theoretical aspects, a summary of the available measurements and measurement techniques, and their impact on improved understanding of QCD and its parameters, such as parton density functions and charm-and beauty-quark masses. The impact of these results on measurements at the LHC and elsewhere is also addressed.

show abstract