In this paper we continue our study of the exact solution in open bosonic string field theory. We present solution in the string field theory defined on the background corresponding to the boundary conformal field theory (BCFT ) describing D25-brane. We then show that the string field theory that arises from the original one by an expansion about this classical solution can be interpreted as th...

The study of open string tachyon condensation in string field theory can be drastically simplified by making an appropriate choice of coordinates on the space of string fields. We show that a very natural coordinate system is suggested by the connection between the worldsheet renormalization group and spacetime physics. In this system only one field, the tachyon, condenses while all other field...

We address the conjecture that at the tachyonic vacuum open strings get transformed into closed strings. We show that it is possible in the context of boundary string field theory to interpolate between the conventional open string theory, characterized by having the D25 brane as the boundary state, and an off-shell (open) string theory where the boundary state is identified with the closed str...

Following Okawa, we insert operators at the boundary of regulated star algebra projectors to construct the leading order tachyon vacuum solution of open string field theory. We also calculate the energy density of the solution and the ratio between the kinetic and the cubic terms. A universal relationship between these two quantities is found. We show that for any twist invariant projector, the...

We construct Dp-branes in bosonic string theory as unstable lumps in a truncated string field theory of open strings on a D25-brane. We find that the lowest level truncation gives good quantitative agreement with the predicted D-brane tension and low-lying spectrum of the D-brane for sufficiently large p and study the effect of the next level corrections for p = 24. We show that a U(1) gauge fi...

We address the conjecture that at the tachyonic vacuum open strings get transformed into closed strings. We show that it is possible in the context of boundary string field theory to interpolate between the conventional open string theory, characterized by having the D25 brane as the boundary state, and an off-shell (open) string theory where the boundary state is identified with the closed str...

We show that the D25 sliver wavefunction, just as the D-instanton sliver, factorizes when expressed in terms of half-string coordinates. We also calculate analytically the star-product of two zero-momentum eigenstates of x̂ using the vertex in the oscillator basis, thereby showing that the star-product in the matter sector can indeed be seen as multiplication of matrices acting on the space of f...

Abstract The objective of this study was to evaluate transcriptomic differences in reproductive tissues beef heifers with high vs. low PAG concentrations carrying viable pregnancies during the attachment and early placentation periods. Bos indicus (n=25) were subjected embryo transfer on day 7 IVP embryos, confirmed at slaughter. Heifers harvested days 25 (n=8) 36 (n=8), samples from endometriu...

Respiratory syncytial virus (RSV) is an important cause of respiratory tract disease in infants and the elderly. Currently, no licensed vaccine against RSV is available. Here we describe the development of a safe and effective intranasal subunit vaccine that is based on recombinant fusion (F) protein bound to the surface of immunostimulatory bacterium-like particles (BLPs) derived from the food...

El Depósito 25 del Museo de La Plata (Buenos Aires, Argentina) es la reserva arqueológica más grande institución fundada a fines siglo XIX pero históricamente careció personal fijo encargado sus colecciones. Ello no solo limitó las posibilidades consulta y análisis material sino que generó un progresivo estado desorden descuido impactó en todos los conjuntos. situación comenzó modificarse el añ...