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We construct sixand four-dimensional toroidal compactifications of the Type I string with magnetic flux on the D-branes. The open strings in this background probe a noncommutative internal geometry.… (More)

- Lars Görlich, Shamit Kachru, P. Tripathy, Sandip P. Trivedi
- 2004

There are two known sources of nonperturbative superpotentials for Kähler moduli in type IIB orientifolds, or F-theory compactifications on Calabi-Yau fourfolds, with flux: Euclidean brane instantons… (More)

- Catherine Adloff, V. G. Andreev, +82 authors Astghik A Hovhannisyan
- 2003

The inclusive e+p single and double differential cross sections for neutral and charged current processes are measured with the H1 detector at HERA. The data were taken in 1999 and 2000 at a… (More)

We study a certain class of four-dimensional N = 1 supersymmetric orientifolds for which the world-sheet parity transformation is combined with a complex conjugation in the compact directions. We… (More)

- Catherine Adloff, V. G. Andreev, +148 authors Paweł Kostka
- 1999

The inclusive single and double differential cross-sections for neutral and charged current processes with four-momentum transfer squared Q2 between 150 and 30 000 GeV2 and with Bjorken x between… (More)

We study supersymmetric intersecting D6-branes wrapping 3-cycles in the Type IIA T 6 /Z Z 4 orientifold background. As a new feature, the 3-cycles in this orbifold space arise both from the untwisted… (More)

- C. Alexa, V. G. Andreev, +47 authors Stanislau Shushkevich
- 2013

Cross sections for elastic and proton-dissociative photoproduction of J/ψ mesons are measured with the H1 detector in positron-proton collisions at HERA. The data were collected at ep centre-of-mass… (More)

- B. I. Abelev, J. Adam, +497 authors I A Maldonado Cervantes
- Physical review letters
- 2014

The p_{T}-differential production cross sections of the prompt charmed mesons D^{0}, D^{+}, D^{*+}, and D_{s}^{+} and their charge conjugate in the rapidity interval -0.96<y_{cms}<0.04 were measured… (More)

We study a new class of N=1 supersymmetric orientifolds in six space-time dimensions. The world-sheet parity transformation is combined with a permutation of the internal complex coordinates. In… (More)

We discuss the compactification of type I strings on a torus with additional background gauge flux on the D9-branes. The solutions to the cancellation of the RR tadpoles display various… (More)