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Mesons named with the letter "f" are scalar mesons (as opposed to a pseudo-scalar meson), and mesons named with the letter "a" are axial-vector mesons (as opposed to an ordinary vector meson) a.k.a. an isoscalar vector meson, while the letters "b" and "h" refer to axial-vector mesons with positive parity, negative C-parity, and quantum numbers I G of 1 + and 0 − respectively.
In high energy physics, a vector meson is a meson with total spin 1 and odd parity (usually noted as J P = 1 −). Vector mesons have been seen in experiments since the 1960s, and are well known for their spectroscopic pattern of masses. [1] The vector mesons contrast with the pseudovector mesons, which also have a total spin 1 but instead have ...
If the meson is not pseudoscalar (J P = 0 −) or vector (J P = 1 −), J is added as a subscript. When the spectroscopic state of the meson is known, it is added in parentheses. When the spectroscopic state is unknown, mass (in MeV/c 2) is added in parentheses. When the meson is in its ground state, nothing is added in parentheses.
“Because the normal stromal tissue is white and cancer is white, the denser the breast, the more difficult it is to detect the cancer,” Reitherman explains. Dense breasts are also considered a ...
Mammography is a common screening method, since it is relatively fast and widely available in developed countries. Mammography is a type of radiography used on the breasts. . It is typically used for two purposes: to aid in the diagnosis of a woman who is experiencing symptoms or has been called back for follow-up views (called diagnostic mammography), and for medical screening of apparently ...
A team of researchers from the Institute of Cancer Research (ICR), London, conducted the trial on 78 patients with different types of early breast cancer. The test looks for 1,800 mutations in the ...
Most cancer isn't caused by BRCA mutations — they account for 5 percent to 10 percent of breast cancers and 15 percent of ovarian cancers — so the gene tests aren't for everyone. But mutations ...
ɒ n /, PIE-on) or pi meson, denoted with the Greek letter pi (π), is any of three subatomic particles: π 0, π +, and π −. Each pion consists of a quark and an antiquark and is therefore a meson. Pions are the lightest mesons and, more generally, the lightest hadrons. They are unstable, with the charged pions π + and π −
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