Laser-assisted pion decay

Analysis of the geometric effect on laser-assisted decay processes

“…We will see exactly how the direction of the laser field can affect the different quantities calculated in the previous section. But, let us first check the consistency of our theoretical calculation by recovering the results previously obtained where the laser field is along the z-axis [15]. A laser field propagating in the direction of the z-axis is theoretically represented by the wave vector k with a component along only the zaxis: k = (0, 0, ω).…”

“…where ǫ µνρσ is the antisymmetric tensor with the convention ǫ 0123 = 1. The reader may refer to our previous works [15,16] to see how these tensors are calculated analytically. After the decay rate, it comes the lifetime of the charged pion, which is defined simply as the inverse of the total decay rate…”

“…In atomic physics, many atomic processes have been studied in the presence of an electromagnetic field, both in relativistic and non-relativistic regimes [3][4][5][6][7][8][9]. In the framework of quantum electrodynamics and electroweak theory, many articles have been devoted to the investigation of scattering [10][11][12][13][14] and decay [15][16][17][18] processes in the presence of an electromagnetic field. In this context, we have recently studied the pion decay process in the presence of a circularly polarized electromagnetic field with a wave vector along the z-axis direction [15].…”

“…In the framework of quantum electrodynamics and electroweak theory, many articles have been devoted to the investigation of scattering [10][11][12][13][14] and decay [15][16][17][18] processes in the presence of an electromagnetic field. In this context, we have recently studied the pion decay process in the presence of a circularly polarized electromagnetic field with a wave vector along the z-axis direction [15]. We found that the laser contributed to the increase of the lifetime, and this result was explained by the so-called quantum Zeno effect.…”

Effect of electron spin polarization in laser-assisted electron-proton scattering

“…In view of the new developments in laser technology, high intensity and short duration laser pulses are generated nowadays in the laboratory [1][2][3]. This has greatly inspired researchers to study various ultrafast processes in the presence of strong laser fields, such as atomic processes [4][5][6][7][8][9][10] and those that occur in the frameworks of quantum electrodynamics (QED) [11][12][13][14][15] and electroweak theory [16][17][18][19][20][21], as well as recently the processes of Higgs boson production beyond the Standard Model [22][23][24]. New experimental perspectives for the study of these processes in the presence of laser field are proposed by future high field laboratories, such as the Extreme Light Infrastructure (ELI) [25] and the Exawatt Center for Extreme Light Studies (XCELS) [26].…”